WWBN AVideo up to 29.0 userSavePhoto.php User::isLogged cross-site request forgery

Summaryinfo

A vulnerability, which was classified as problematic, has been found in WWBN AVideo up to 29.0. Impacted is the function User::isLogged of the file objects/userSavePhoto.php. Performing a manipulation results in cross-site request forgery. This vulnerability is known as CVE-2026-43877. Remote exploitation of the attack is possible. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in WWBN AVideo up to 29.0. It has been classified as problematic. This affects the function User::isLogged of the file objects/userSavePhoto.php. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. CWE is classifying the issue as CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. This is going to have an impact on integrity. The summary by CVE is:

WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/userSavePhoto.php is a legacy profile-photo endpoint that accepts a base64 POST parameter and writes the decoded bytes to videos/userPhoto/photo.png. Its only access control is User::isLogged(). It does not end in .json.php, so it is excluded from the project's global autoCSRFGuard (which is suffix-scoped in objects/include_config.php). There is no CSRF token, no Origin/Referer check, and no MIME validation of the decoded bytes. Because AVideo's default cookie policy is SameSite=None; Secure on HTTPS (objects/functionsPHP.php:227), an attacker who lures a logged-in user to a malicious page can overwrite that user's profile photo with arbitrary bytes and also triggers a site-wide clearCache(true) on every forged request. Commit 9c38468041505e637101c5943c5370c68f48e3ac contains an updated fix.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-43877 since 05/04/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:objects/userSavePhoto.php it is possible to find vulnerable targets with Google Hacking.

Applying the patch 9c38468041505e637101c5943c5370c68f48e3ac is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Vendor

• WWBN

Name

• AVideo

Version

• 29.0

License

• open-source

Website

• Product: https://github.com/WWBN/AVideo/

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