CVE-2025-3003: ESAFENET CDG 3 SQL Injection Vulnerability

CVE-2025-3003 Overview

CVE-2025-3003 is a SQL injection vulnerability in ESAFENET CDG 3, a data leakage prevention product. The flaw resides in an unknown function of the /CDGServer3/UserAjax endpoint. Attackers can manipulate the Username parameter to inject arbitrary SQL statements against the backend database.

The vulnerability is remotely exploitable and requires low privileges. Public disclosure has occurred, and the exploit details have been released. ESAFENET did not respond to the disclosure attempt, leaving affected deployments without an official vendor patch at the time of publication.

Critical Impact
Authenticated remote attackers can execute arbitrary SQL queries against the ESAFENET CDG 3 database by injecting payloads into the Username parameter of /CDGServer3/UserAjax, enabling data disclosure, modification, or deletion.

Affected Products

ESAFENET CDG 3
Deployments exposing the /CDGServer3/UserAjax endpoint
Any environment relying on the vulnerable Username parameter handler

Discovery Timeline

2025-03-31 - CVE-2025-3003 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-3003

Vulnerability Analysis

The vulnerability is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component. The affected code path accepts the Username argument from a client-supplied HTTP request and incorporates it directly into a SQL query sent to the backend database.

Because the input is not parameterized or sanitized, attackers can break out of the intended query context. Successful exploitation allows reading, modifying, or deleting records within the ESAFENET CDG 3 database. The attack requires network access and low-level authentication, with no user interaction.

ESAFENET CDG 3 is used to enforce document encryption and data loss prevention policies. Compromise of its backend database can expose encryption keys, policy metadata, and user credentials used across the protected environment.

Root Cause

The root cause is improper neutralization of the Username input before it is concatenated into a SQL statement. The application does not use prepared statements or input validation on the parameter. This permits standard SQL injection patterns such as boolean-based, union-based, and time-based payloads.

Attack Vector

An attacker sends a crafted HTTP request to /CDGServer3/UserAjax with a malicious value in the Username parameter. The vulnerable backend passes the payload into the SQL layer, which executes attacker-controlled logic. Technical disclosure is documented in the public GitHub proof-of-concept writeup and the VulDB entry #302052.

No verified exploit code is reproduced here. Refer to the external advisory for payload details.

Detection Methods for CVE-2025-3003

Indicators of Compromise

HTTP requests to /CDGServer3/UserAjax containing SQL metacharacters such as single quotes, UNION SELECT, SLEEP(, or comment sequences (--, /*) in the Username parameter.
Unexpected database errors or long response delays correlating with requests to the UserAjax endpoint.
Anomalous read or write volume against ESAFENET CDG 3 database tables storing user, policy, or key material.

Detection Strategies

Deploy web application firewall (WAF) rules targeting SQL injection patterns on requests to /CDGServer3/UserAjax.
Enable database audit logging for queries originating from the CDG 3 application account and alert on malformed or union-based statements.
Correlate access logs with authentication telemetry to identify low-privilege accounts issuing high-entropy Username values.

Monitoring Recommendations

Capture full HTTP request bodies for the CDG 3 management interfaces and ingest them into a centralized SIEM.
Baseline normal request patterns for /CDGServer3/UserAjax and flag deviations in parameter length, encoding, or character distribution.
Monitor for outbound connections from the CDG 3 server following suspicious requests, which may indicate secondary exploitation.

How to Mitigate CVE-2025-3003

Immediate Actions Required

Restrict network access to the ESAFENET CDG 3 management interface to trusted administrative networks only.
Rotate credentials for any low-privilege accounts that can reach /CDGServer3/UserAjax, as these are prerequisites for exploitation.
Review database audit logs for signs of prior exploitation, including unexpected SELECT, UPDATE, or DROP activity.

Patch Information

No vendor patch is available. ESAFENET did not respond to the disclosure according to the VulDB advisory. Organizations should track vendor channels for an eventual fix and apply it immediately once released.

Workarounds

Place the CDG 3 application behind a WAF configured to block SQL injection payloads on the UserAjax endpoint.
Enforce strict input validation at a reverse proxy by rejecting non-alphanumeric characters in the Username parameter.
Isolate the CDG 3 database account with least-privilege permissions, removing rights to sensitive tables not required by the application.
Disable or firewall off the /CDGServer3/UserAjax endpoint if it is not required for business operations.

bash

# Example NGINX rule to block common SQL metacharacters in the Username parameter
location /CDGServer3/UserAjax {
    if ($arg_Username ~* "('|\"|--|;|union|select|sleep|benchmark)") {
        return 403;
    }
    proxy_pass http://cdg3_backend;
}