CVE-2026-39366

MEDIUM6.5

WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php

Published Apr 7, 2026

Modified 2 weeks ago

Details

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.

References

WEB

https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c

DETECTION

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

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-39366

CVSS Analysis

CVSS v3.1

6.5

Exploitability

Attack Vector