{"id":"CVE-2026-39366","state":"PUBLISHED","title":"WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php","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.","publishedAt":"2026-04-07T19:21:12.156Z","updatedAt":"2026-04-08T19:23:04.265Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["WWBN AVideo"],"affected":[{"vendor":"WWBN","product":"AVideo","versions":[{"version":"<= 26.0","status":"affected"}]}],"references":["https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p","https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c"],"weaknesses":["CWE-345"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/39xxx/CVE-2026-39366.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-39366","state":"PUBLISHED","datePublished":"2026-04-07T19:21:12.156Z","dateUpdated":"2026-04-08T19:23:04.265Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-06T21:29:17.350Z"},"containers":{"cna":{"title":"WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"WWBN","product":"AVideo","versions":[{"version":"<= 26.0","status":"affected"}]}],"references":[{"url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p","name":"https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c","name":"https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345: Insufficient Verification of Data Authenticity","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-07T19:21:12.156Z"},"source":{"advisory":"GHSA-mmw7-wq3c-wf9p","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-08T19:20:45.647672Z","id":"CVE-2026-39366","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-08T19:23:04.265Z"}}]}}}