WWBN AVideo up to 29.0 Subscription agreementCancel.json.php authorization

Summaryinfo

A vulnerability was found in WWBN AVideo up to 29.0. It has been classified as problematic. This impacts an unknown function of the file plugin/PayPalYPT/agreementCancel.json.php of the component Subscription Handler. This manipulation causes authorization. The identification of this vulnerability is CVE-2026-43883. It is possible to initiate the attack remotely. There is no exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as problematic was found in WWBN AVideo up to 29.0. Affected by this vulnerability is an unknown code block of the file plugin/PayPalYPT/agreementCancel.json.php of the component Subscription Handler. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect integrity, and availability. The summary by CVE is:

WWBN AVideo is an open source video platform. In versions up to and including 29.0, plugin/PayPalYPT/agreementCancel.json.php cancels a PayPal billing agreement using an attacker-supplied agreement parameter without verifying that the authenticated user owns the agreement. A low-privilege authenticated user who learns or obtains another user's PayPal billing agreement ID can silently suspend the victim's recurring subscription, causing revenue loss to the platform and loss of paid service to the victim. Commit 0da3dcff1eda2f497694bf82b559829471c292c2 contains an updated fix.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-43883 since 05/04/2026. The exploitation appears to be difficult. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit.

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

Applying the patch 0da3dcff1eda2f497694bf82b559829471c292c2 is able to eliminate this problem. The bugfix is ready for download at github.com.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• WWBN

Name

• AVideo

Version

• 29.0

License

• open-source

Website

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

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