Race Condition Vulnerability in WWBN AVideo by WWBN
CVE-2026-123486

6MEDIUM

Key Information:

Vendor

Wwbn

Status
Avideo
Vendor
CVE Published:
6 November 2026

What is CVE-2026-123486?

WWBN AVideo versions 29.0 through 29.4.0 contain a race condition vulnerability in the PayPal IPN integration via ipn.php. This flaw allows attackers to exploit the non-atomic deduplication check, enabling them to bypass IPN replay protection. By concurrently sending valid recurring-payment notifications, attackers can manipulate the system to register duplicate wallet credits and unauthorized subscription renewals, significantly impacting the integrity of transactions.

Affected Version(s)

AVideo 29.0 <= 29.4.0

References

https://github.com/WWBN/AVideo/security/advisories/GHSA-q...
vendor-advisory
https://www.vulncheck.com/advisories/wwbn-avideo-29.0-thr...
third-party-advisory

CVSS V4

Score:
6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Vectrain51
.