CVE-2026-43883 AVideo: IDOR in PayPalYPT Plugin Allows Any Authenticated User to Cancel Arbitrary PayPal Subscription Agreements
Authenticated users can cancel arbitrary PayPal subscriptions by manipulating agreement IDs, causing service loss and revenue impact.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-43883?
CVE-2026-43883 is a medium-severity missing authorization vulnerability in WWBN AVideo, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-43883?
2 open source packages ship an affected version, including wwbn/avideo.
| Package | Affected | Fixed in |
|---|---|---|
wwbn/avideo Packagist | All versions to 29.0 | None |
wwbn/avideo Packagist | All versions to 29.0 | None |
How do I fix CVE-2026-43883?
No fix has been published for CVE-2026-43883 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-43883 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43883 exists.
Sources
Also known as GHSA-958h-qp3x-q4gj.