What is CVE-2026-123486?

CVE-2026-123486 is a medium-severity vulnerability in Wwbn Avideo, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.3/10. Published 2026-11-06.

How severe is CVE-2026-123486?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Wwbn Avideo

CVE-2026-123486

WWBN AVideo 29.0 through 29.4.0 contains a race condition vulnerability in plugin/PayPalYPT/ipn.php that allows attackers to bypass IPN replay protection due to a non-atomic deduplication check and insert. Attackers can concurrently replay a captured valid recurring-payment notification so both requests pass isRecurringPaymentIdUsed(), obtaining duplicate wallet credits and subscription renewals.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Wwbn Avideo

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

GitHub Security Advisory (GHSA-q77r-9mjq-mjw6) (vendor-advisory)
VulnCheck Advisory: WWBN AVideo 29.0 through 29.4.0 Race Condition in PayPal IPN Deduplication via ipn.php (third-party-advisory)

Frequently asked questions

What is CVE-2026-123486?: CVE-2026-123486 is a medium-severity vulnerability in Wwbn Avideo, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.3/10. Published 2026-11-06.
How severe is CVE-2026-123486?: Medium severity. CVSS v3 base score is 5.3 out of 10.