CVE-2025-9148: Chat2DB JDBC Connection Handler SQLi Flaw

CVE-2025-9148 Overview

CVE-2025-9148 is a SQL injection vulnerability affecting CodePhiliaX Chat2DB versions up to 0.3.7. The flaw resides in the DataSourceController.java file within the JDBC Connection Handler component, at path ai/chat2db/server/web/api/controller/data/source/DataSourceController.java. Attackers can manipulate input to inject SQL statements remotely without local access. The vulnerability is classified under CWE-74 covering improper neutralization of special elements in output used by downstream components. Public exploit details have been released. The vendor was contacted before public disclosure but did not respond.

Critical Impact
Authenticated remote attackers can inject SQL through the JDBC connection handler, potentially leading to remote code execution via H2 JDBC connection abuse.

Affected Products

CodePhiliaX Chat2DB versions up to and including 0.3.7
Component: JDBC Connection Handler (DataSourceController.java)
Deployments exposing the Chat2DB data source management API

Discovery Timeline

2025-08-19 - CVE-2025-9148 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-9148

Vulnerability Analysis

Chat2DB is an AI-assisted database client that manages JDBC connections to various data sources. The DataSourceController accepts user-supplied parameters that are passed to JDBC connection routines without sufficient validation. An attacker with low-privilege API access can supply crafted input that alters SQL statements executed by the backend or manipulates JDBC connection URLs.

The technical report published on Notion documents how the JDBC connection handler can be abused with H2 database connection strings to escalate the injection into remote code execution. H2 supports the INIT parameter in its JDBC URL, which executes arbitrary SQL on connection. When combined with H2 aliases that invoke Java code, this pattern converts a JDBC configuration flaw into code execution on the Chat2DB host.

Root Cause

The root cause is improper neutralization of special elements passed to a downstream component (CWE-74). The controller trusts data source parameters submitted through the API and forwards them into JDBC connection construction. Neither the URL structure nor the query payloads are sanitized against known dangerous patterns such as H2 INIT clauses or embedded SQL delimiters.

Attack Vector

An authenticated remote attacker interacts with the Chat2DB data source API and submits a manipulated JDBC connection specification. Because the attack is network-reachable and requires only low privileges, any user permitted to configure a data source can trigger the flaw. Public proof-of-concept material referenced by VulDB entry #320527 and the Notion technical writeup describes the exploitation path in detail.

No verified exploit code is reproduced here. See the referenced technical writeup for the full exploitation chain.

Detection Methods for CVE-2025-9148

Indicators of Compromise

Data source creation or update requests to /api/data/source endpoints containing jdbc:h2: URLs with INIT= parameters
JDBC connection strings that reference RUNSCRIPT, CREATE ALIAS, or CSVREAD functions
Unexpected outbound network connections from the Chat2DB process to attacker-controlled hosts
New child processes spawned by the Chat2DB Java runtime that execute shell commands or scripting interpreters

Detection Strategies

Inspect Chat2DB application logs for data source parameters containing SQL keywords, semicolons, or H2-specific JDBC options
Monitor the Java process tree for anomalous child process creation originating from the Chat2DB service
Correlate authenticated API activity with subsequent database connection attempts to identify chained abuse

Monitoring Recommendations

Enable verbose request logging on the DataSourceController endpoints and forward logs to a centralized analytics platform
Alert on file writes into Chat2DB working directories by the Java process, which can indicate script staging
Track outbound DNS and HTTP connections from application servers hosting Chat2DB to detect callback traffic from injected payloads

How to Mitigate CVE-2025-9148

Immediate Actions Required

Restrict network access to Chat2DB management interfaces to trusted administrators only
Audit user accounts with data source configuration privileges and remove unnecessary access
Review historical API logs for suspicious JDBC URL submissions that predate remediation
Isolate Chat2DB instances from sensitive internal networks until a fixed release is deployed

Patch Information

As of the last NVD update on 2026-06-17, the vendor did not respond to disclosure attempts and no official patched release is referenced. Monitor the CodePhiliaX Chat2DB project and VulDB entry #320527 for updates on a fixed version.

Workarounds

Block JDBC URL schemes such as jdbc:h2: at an application gateway if not required for legitimate use
Deploy a reverse proxy rule that rejects data source payloads containing INIT=, RUNSCRIPT, or CREATE ALIAS tokens
Run Chat2DB under a least-privilege service account with restricted filesystem and network permissions
Disable public exposure of the Chat2DB API and require VPN or zero-trust network access for administrators

bash

# Example reverse proxy rule to block dangerous JDBC parameters
location /api/data/source {
    if ($request_body ~* "(INIT=|RUNSCRIPT|CREATE\s+ALIAS|jdbc:h2:)") {
        return 403;
    }
    proxy_pass http://chat2db_backend;
}