CVE-2025-8164: Public Chat Room 1.0 SQL Injection Flaw

CVE-2025-8164 Overview

CVE-2025-8164 is a SQL injection vulnerability in code-projects Public Chat Room 1.0, developed by Fabian. The flaw resides in the send_message.php script, where the ID parameter is passed to a database query without proper sanitization. Attackers can manipulate this parameter remotely to inject arbitrary SQL statements. The issue is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component). Public disclosure of the exploit increases the likelihood of opportunistic attacks against exposed deployments.

Critical Impact
Remote authenticated attackers can inject SQL through the ID parameter in send_message.php, potentially exposing or modifying chat application data.

Affected Products

Fabian Public Chat Room 1.0
CPE: cpe:2.3:a:fabian:public_chat_room:1.0
Component: send_message.php

Discovery Timeline

2025-07-25 - CVE-2025-8164 published to the National Vulnerability Database (NVD)
2026-04-29 - Last updated in NVD database

Technical Details for CVE-2025-8164

Vulnerability Analysis

The vulnerability exists in the send_message.php endpoint of Public Chat Room 1.0. The ID parameter accepted by this script is concatenated directly into a SQL query string. Because the input is not validated, escaped, or bound through a parameterized query, attackers can break out of the intended SQL context and append additional clauses or statements.

Exploitation requires low privileges and no user interaction. Successful injection can be used to read message records, enumerate database schema, or alter stored chat data. The attack is reachable over the network wherever the application is deployed without additional access controls.

Root Cause

The root cause is improper neutralization of user-controlled input before it is used in a SQL statement [CWE-74]. The send_message.php handler trusts the ID value supplied by the client and passes it to the database layer without sanitization or prepared statements.

Attack Vector

An attacker sends a crafted HTTP request to send_message.php containing a malicious payload in the ID parameter. The injected SQL fragment is executed by the backend database in the context of the application's database user. No local access is required, and the attacker only needs basic authenticated access to the chat application.

No verified proof-of-concept code is published in the referenced advisories. Technical details are tracked in the GitHub CVE Issue #3 and VulDB entry #317578.

Detection Methods for CVE-2025-8164

Indicators of Compromise

Unexpected HTTP requests to send_message.php containing SQL meta-characters such as single quotes, UNION, SELECT, OR 1=1, or comment sequences in the ID parameter.
Database error messages or HTTP 500 responses generated by requests to the messaging endpoint.
Anomalous outbound query volume from the web application database user account.

Detection Strategies

Inspect web server access logs for send_message.php requests where the ID parameter is non-numeric or contains URL-encoded SQL syntax.
Deploy a web application firewall (WAF) rule set targeting SQL injection patterns on the chat application's request path.
Enable database query logging and alert on UNION-based or stacked queries originating from the application service account.

Monitoring Recommendations

Correlate HTTP request logs with database audit logs to identify malformed ID values that result in query errors.
Monitor for new or unexpected database tables, dropped tables, or large SELECT operations against the chat schema.
Track authentication events for accounts that subsequently issue requests against send_message.php with abnormal parameter content.

How to Mitigate CVE-2025-8164

Immediate Actions Required

Restrict network access to the Public Chat Room application until a fix is applied, ideally placing it behind authenticated VPN access or an IP allow list.
Deploy WAF rules that block SQL injection patterns on the ID parameter of send_message.php.
Audit the chat database for unauthorized modifications, new accounts, or extracted records.

Patch Information

No vendor patch is referenced in the available advisories. Operators should track the code-projects resource hub and the VulDB entry #317578 for updates. Until an official fix is released, modify send_message.php to use parameterized queries or prepared statements for the ID parameter and apply strict server-side validation that enforces an integer type.

Workarounds

Replace inline SQL concatenation in send_message.php with PDO prepared statements or mysqli_stmt_bind_param to enforce type safety on the ID parameter.
Apply server-side input validation that rejects any ID value that is not a positive integer before reaching the database layer.
Run the application database account with least privilege so that injection cannot reach administrative tables or system commands.

bash

# Example: validate the ID parameter at the web server (nginx) before it reaches PHP
location = /send_message.php {
    if ($arg_ID !~ ^[0-9]+$) {
        return 400;
    }
    fastcgi_pass unix:/run/php/php-fpm.sock;
    include fastcgi_params;
}