CVE-2007-0398

Vulnerability

The forum.php3 script in a-forum by Arnaud Guyonne (Arnotic) is vulnerable to multiple cross-site scripting (XSS) attacks. Remote attackers can inject arbitrary web script or HTML through the Sujet (subject) or Pseudo (username) fields. Affected versions include all releases prior to the discovery date (January 2007). [1]

Exploitation

An attacker can exploit this vulnerability by submitting a crafted form containing malicious JavaScript code in either the Sujet or Pseudo parameter. No authentication is required; the attacker only needs to post the malicious input to the forum. A victim viewing the affected page will have the injected script executed in their browser. [1]

Impact

Successful exploitation allows the attacker to execute arbitrary script in the context of the victim's browser. This can lead to session hijacking, defacement, or redirection to malicious sites. The impact is limited to client-side attacks but can compromise user data and trust. [1]

Mitigation

No official fix or updated version has been identified in available references. Administrators should sanitize user input for the Sujet and Pseudo fields to prevent XSS. As the software may be end-of-life, migration to a maintained alternative is recommended. [1]