CVE-2026-39366
WWBN AVideo is an open source video platform. In versions 26.0 and prior, the PayPal IPN v1 handler at plugin/PayPalYPT/ipn.php lacks transaction deduplication, allowing an attacker to replay a single legitimate IPN notification to repeatedly inflate their wallet balance and renew subscriptions. The newer ipnV2.php and webhook.php handlers correctly deduplicate via PayPalYPT_log entries, but the v1 handler was never updated and remains actively referenced as the notify_url for billing plans.
- Score
- CVSS 3.1 6.5 Medium
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-04-07
- Last modified
- 2026-04-08
- Weaknesses
- CWE-345
Affected products
References
- https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c
- https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p
