CVE-2026-43883

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.

CVSS v3.1

4.2 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

CVSS v3.1

4.2 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

EPSS

0.17% chance of exploitation in the next 30 days, 6th percentile

Published

2026-05-11

Updated

2026-05-12

Proof-of-concept exploits (1)

• advisories/GHSA-958h-qp3x-q4gj

References

• CVE Record
• NVD entry

Related

• CVE-2026-43882
• CVE-2026-43884
• CVE-2026-43880
• CVE-2026-43885
• CVE-2026-43879
• CVE-2026-43891