CVE-2026-39366 | THREATINT

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.

PUBLISHED Reserved 2026-04-06 | Published 2026-04-07 | Updated 2026-04-08 | Assigner GitHub_M

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Problem types

CWE-345: Insufficient Verification of Data Authenticity

Product status

<= 26.0

affected

References

github.com/...AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p exploit

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

github.com/...ommit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c

cve.org (CVE-2026-39366)

nvd.nist.gov (CVE-2026-39366)

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