CVE-2026-39366

Name: CVE-2026-39366
Creator: NVD / NIST
Published: 2026-04-07T20:16:30.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.17%

Last modified Jun 17, 2026

CVE-2026-39366 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.17%

6.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-345

Affected Software

Vendor	Product	Versions
Wwbn	Avideo	<= 26.0

References

https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1cPatch
https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9pThird Party Advisory
https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9pThird Party Advisory

Timeline

Published: Apr 7, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-39366?

How severe is CVE-2026-39366?

CVE-2026-39366 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.

How do I fix CVE-2026-39366?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-39366?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST