{"affected":[{"defaultStatus":"unaffected","product":"AVideo","source":"CNA: VulnCheck","vendor":"WWBN","versions":[{"lessThanOrEqual":"29.4.0","status":"affected","version":"29.0","versionType":"custom"}]}],"cveId":"CVE-2026-123486","cwes":["CWE-367"],"description":"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.","epss":{"date":"2026-11-10","percentile":0.06439,"score":0.0017},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6"}],"kev":null,"metrics":[{"score":6,"severity":"medium","source":"CNA: VulnCheck","vector":"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","version":"4.0"},{"score":5.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},{"score":6,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"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","version":"4.0"},{"score":5.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}],"modifiedAt":1794366093272,"publishedAt":1793977248677,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/wwbn-avideo-29.0-through-29.4.0-race-condition-in-paypal-ipn-deduplication-via-ipn-php"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-q77r-9mjq-mjw6"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/wwbn-avideo-29.0-through-29.4.0-race-condition-in-paypal-ipn-deduplication-via-ipn-php"}],"remediation":[],"revision":"dc09670e09a07554b14c89fb13cf969e660bef77847a822c2e5b338a8dd8dc56","sources":[{"modifiedAt":1794366093272,"name":"CNA: VulnCheck","retrievedAt":1794366510325,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123486"},{"modifiedAt":1793978237897,"name":"NVD","retrievedAt":1793990196021,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123486"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794366530121,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123486"}],"ssvc":{"assessedAt":1794366053262,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"WWBN AVideo 29.0 through 29.4.0 Race Condition in PayPal IPN Deduplication via ipn.php","updatedAt":1794366530121}