CVE-2026-39366

6.5 mediumEPSS 0.2%

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.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-31)
CWE: CWE-345
Published: 2026-04-07
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

wwbn:avideo

References

https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c
https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p
https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p

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