CVE-2026-123486
WWBN AVideo 29.0 through 29.4.0 Race Condition in PayPal IPN Deduplication via ipn.php
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| AVideo WWBN |
≥ 29.0; ≤ 29.4.0 (affected, custom)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.0 medium |
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 5.3 medium |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N | CNA: VulnCheck |
| 4.0 / 6.0 medium |
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 5.3 medium |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N | NVD: [email protected] |
Exploit evidence
- https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6
exploit · ADP: CISA-ADP
References
- https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6CNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/wwbn-avideo-29.0-through-29.4.0-race-condition-in-paypal-ipn-deduplication-via-ipn-phpCNA: VulnCheck · third-party-advisory
- https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6ADP: CISA-ADP · exploit
- https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6[email protected]
- https://www.vulncheck.com/advisories/wwbn-avideo-29.0-through-29.4.0-race-condition-in-paypal-ipn-deduplication-via-ipn-php[email protected]
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