Description
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.
Affected products
wwbn: avideo
References3
- github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbb… Patch
- github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p Third Party Advisory
- github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p Third Party Advisory
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 0% percentile: 7 · as of 12 November 2026
- CWE
- CWE-345
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.