WWBN AVideo CustomizeUser setSubscribers.json.php setExtraSubscribers users_id/ExtraSubscribers cross-site request forgery

Summaryinfo

A vulnerability has been found in WWBN AVideo and classified as problematic. This affects the function User::setExtraSubscribers of the file plugin/CustomizeUser/setSubscribers.json.php of the component CustomizeUser. The manipulation of the argument users_id/ExtraSubscribers leads to cross-site request forgery. This vulnerability is documented as CVE-2026-88871. The attack can be initiated remotely. There is not any exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in WWBN AVideo (the affected version unknown). This issue affects the function User::setExtraSubscribers of the file plugin/CustomizeUser/setSubscribers.json.php of the component CustomizeUser. The manipulation of the argument users_id/ExtraSubscribers with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 (master, 2026-08-23) contains a cross-site request forgery vulnerability in the CustomizeUser plugin's plugin/CustomizeUser/setSubscribers.json.php endpoint. The script reads users_id and ExtraSubscribers from $_REQUEST and calls User::setExtraSubscribers() without requiring a POST request or a valid CSRF token; autoCSRFGuard() is applied only to POST requests to *.json.php, and the mutation does not pass through ObjectYPT::save()/isUntrustedRequest(), so a cross-origin GET succeeds. An unauthenticated remote attacker who induces a logged-in administrator to load a crafted page (for example an <img> tag pointing at the endpoint) can forge the ExtraSubscribers count displayed on any user's channel. The CustomizeUser plugin is enabled by default, and no patched version was available at the time of reporting.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-88871 since 09/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

By approaching the search of inurl:plugin/CustomizeUser/setSubscribers.json.php it is possible to find vulnerable targets with Google Hacking.

Applying the patch c3edcc274c389816d434acadac07ee78eaf330c1 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• WWBN

Name

• AVideo

License

• open-source

Website

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

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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