Soumettre #885228: Piwigo 16.3.0 Cross Site Scripting

Piwigo 16.3.0 (https://github.com/Piwigo/Piwigo) contains a reflected cross-site scripting vulnerability on public authentication-related pages such as identification.php, register.php, and password.php. The application reads the user-controlled lang cookie, and if the value is invalid, it embeds that cookie value directly into a fatal error HTML response without proper output encoding. As a result, attacker-controlled HTML or JavaScript in the lang cookie is reflected into the response body and executed in the victim browser. The issue is cookie-based rather than URL-only: exploitation requires the attacker to make the victim browser send a malicious lang cookie for the target origin. No authentication is required to reach the vulnerable pages.

• La source: ⚠️ https://github.com/Leousum/VulnPoC/blob/main/Piwigo%2016.3.0/reflected_XSS.md
• Utilisateur: Leousum (UID 37212)
• Soumission: 10/07/2026 11:51 (il y a 2 mois)
• Modérer: 23/08/2026 18:57 (1 month later)
• Statut: Accepté
• Entrée VulDB: 394569 [Piwigo 16.3.0 Public Authentication Page lang cross site scripting]
• Points: 20