CVE-2026-39366: Wwbn Avideo

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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: up to and including 26.0

Published 2026-04-07. Last modified 2026-07-24.