{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39366", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-06T21:29:17.350Z", "datePublished": "2026-04-07T19:21:12.156Z", "dateUpdated": "2026-04-08T19:23:04.265Z"}, "containers": {"cna": {"title": "WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php", "problemTypes": [{"descriptions": [{"cweId": "CWE-345", "lang": "en", "description": "CWE-345: Insufficient Verification of Data Authenticity", "type": "CWE"}]}], "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"}}], "references": [{"name": "https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p"}, {"name": "https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c", "tags": ["x_refsource_MISC"], "url": "https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c"}], "affected": [{"vendor": "WWBN", "product": "AVideo", "versions": [{"version": "<= 26.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-07T19:21:12.156Z"}, "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."}], "source": {"advisory": "GHSA-mmw7-wq3c-wf9p", "discovery": "UNKNOWN"}}, "adp": [{"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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-08T19:23:04.265Z"}}]}}

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{"cveTags": [], "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."}], "id": "CVE-2026-39366", "lastModified": "2026-04-08T21:27:00.663", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-07T20:16:30.510", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/commit/8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c"}, {"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-mmw7-wq3c-wf9p"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "AVideo", "source": "cna", "vendor": "WWBN"}, "product": "avideo", "vendor": "wwbn"}], "analysis": {"en": {"generated_at": "2026-04-07T22:21:21.805216+00:00", "value": {"mitigation_remediation": ["Upgrade WWBN AVideo to the latest release (26.1 or newer) which includes the fixed ipnV2.php and webhook.php handlers.", "If an upgrade is not immediately possible, change the PayPal billing plan notify_url to point to ipnV2.php or webhook.php, removing the vulnerable v1 endpoint from exposure.", "Apply the patch commit 8f53e9d9c6aaa07d51ace30691981edbbfb5ca1c directly if the upgrade path is unavailable."], "summary": {"action": "Apply patch", "impact": "Unauthorized wallet balance inflation and subscription fraud"}, "threat_synthesis": {"affected_systems": "The affected product is WWBN AVideo, an open\u2011source video platform. All releases up to and including version 26.0 are vulnerable, because the v1 IPN handler was never updated. Versions 26.1 and later contain the corrected ipnV2.php and webhook.php handlers that perform proper deduplication. Systems still using the old notify_url in PayPal billing plans are at risk.", "description_and_impact": "This vulnerability occurs in the PayPal IPN version 1 handler (plugin/PayPalYPT/ipn.php) of WWBN AVideo. The handler lacks transaction deduplication, allowing an attacker to replay a legitimate PayPal IPN notification. Each replay inflates the victim's wallet balance and can renew subscription services, resulting in unauthorized financial gain for the attacker. The weakness is a classic replay attack (CWE\u2011345) and directly affects the integrity of wallet balances and subscription status.", "risk_and_exploitability": "The CVSS base score is 6.5, indicating moderate severity. The exploit does not require privileged access; an attacker only needs to send replayed IPN messages to the configured notify_url. Because the vulnerability is driven by a missing server\u2011side check, it can be executed remotely with minimal effort. The EPSS score is not publicly available, and the issue is not listed in the KEV catalog, so the current likelihood of exploitation is uncertain but potentially significant in environments where the PayPal IPN v1 endpoint is exposed."}}}}, "created": "2026-04-08T19:34:46.337746+00:00", "updated": "2026-04-08T19:46:21.633166+00:00", "vendors": ["wwbn", "wwbn$PRODUCT$avideo"]}