WWBN AVideo CustomizeUser objects/user.php User::setDonationLink donationLink cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in WWBN AVideo. Affected by this issue is the function User::setDonationLink of the file objects/user.php of the component CustomizeUser. The manipulation of the argument donationLink results in cross site scripting. This vulnerability is cataloged as CVE-2026-89253. The attack may be launched remotely. There is no exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in WWBN AVideo (unknown version). It has been classified as problematic. Affected is the function User::setDonationLink of the file objects/user.php of the component CustomizeUser. The manipulation of the argument donationLink with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in the user 'donationLink' profile field. User::setDonationLink() (objects/user.php) stores the value and save() validates it only with filter_var(..., FILTER_VALIDATE_URL), which accepts strings such as http://evil.example/"onmouseover=alert(document.domain)//, while getDonationLink() applies only strip_tags() and does not encode double quotes. plugin/CustomizeUser/actionButton.php echoes the value unencoded into an <a href="..."> attribute, and that button is included from view/modeYoutubeBottom.php on the watch page when the CustomizeUser option allowDonationLink is enabled. An authenticated user who updates their own profile via objects/userUpdate.json.php can therefore break out of the href attribute and inject an event handler that executes JavaScript in the browser of any visitor—including an administrator—who views the attacker's videos and interacts with (for example, hovers over) the donation button. The issue was unfixed at the time of reporting.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-89253 since 09/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

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

Applying the patch c3edcc274c389816d434acadac07ee78eaf330c1 is able to eliminate this problem.

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Productinfo

Vendor

• WWBN

Name

• AVideo

License

• open-source

Website

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

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