CVE-2026-8125

Vulnerability

Overview

CVE-2026-8125 is a SQL injection vulnerability discovered in the Simple Chat System version 1.0, a PHP-based chat application. The flaw resides in the sendMessage.php script, where the msg parameter is not properly validated or sanitized before being used in database queries. The application fails to check the type, length, or business validity of user-supplied data, and does not filter special characters, allowing an attacker to inject arbitrary SQL commands [1].

Exploitation

The vulnerability can be exploited remotely without authentication. An attacker sends a crafted POST request to /chat_project/sendMessage.php with a malicious msg parameter containing SQL injection payloads. The provided proof-of-concept demonstrates using ' OR updatexml(1,concat(0x7e,database(),0x7e),1) OR ' to extract database information via error-based injection. The attack requires only network access to the web server and no prior privileges [1].

Impact

Successful exploitation allows an attacker to read, modify, or delete database contents, potentially compromising user credentials, chat messages, and other sensitive data. The attacker may also escalate privileges or gain further access to the underlying system depending on database permissions. The public availability of the exploit increases the risk of widespread attacks against unpatched installations [1].

Mitigation

As of the publication date, no official patch has been released by the vendor. Users are advised to apply input validation and parameterized queries to the msg parameter in sendMessage.php. Until a fix is available, restricting network access to the application or implementing a web application firewall (WAF) may reduce exposure. The vendor's site (code-projects.org) hosts the software but has not issued an advisory [2].