CVE-2026-40929

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40929", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-15T20:40:15.517Z", "datePublished": "2026-04-21T22:16:54.781Z", "dateUpdated": "2026-04-22T17:58:51.253Z"}, "containers": {"cna": {"title": "WWBN AVideo's missing CSRF protection in objects/commentDelete.json.php enables mass comment deletion against moderators and content creators", "problemTypes": [{"descriptions": [{"cweId": "CWE-352", "lang": "en", "description": "CWE-352: Cross-Site Request Forgery (CSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr"}, {"name": "https://github.com/WWBN/AVideo/commit/184f36b1896f3364f864f17c1acca3dd8df3af27", "tags": ["x_refsource_MISC"], "url": "https://github.com/WWBN/AVideo/commit/184f36b1896f3364f864f17c1acca3dd8df3af27"}], "affected": [{"vendor": "WWBN", "product": "AVideo", "versions": [{"version": "<= 29.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-21T22:16:54.781Z"}, "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/commentDelete.json.php` is a state-mutating JSON endpoint that deletes comments but performs no CSRF validation. It does not call `forbidIfIsUntrustedRequest()`, does not verify a CSRF/global token, and does not check `Origin`/`Referer`. Because AVideo intentionally sets `session.cookie_samesite=None` (to support cross-origin embed players), a cross-site request from any attacker-controlled page automatically carries the victim's `PHPSESSID`. Any authenticated victim who has authority to delete one or more comments (site moderators, video owners, and comment authors) can be tricked into deleting comments en masse simply by visiting an attacker page. Commit 184f36b1896f3364f864f17c1acca3dd8df3af27 contains a fix."}], "source": {"advisory": "GHSA-8qm8-g55h-xmqr", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-22T17:58:28.716992Z", "id": "CVE-2026-40929", "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": "2026-04-22T17:58:51.253Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-40929", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-22T17:58:28.716992Z"}}}], "references": [{"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-22T17:58:47.886Z"}}], "cna": {"title": "WWBN AVideo's missing CSRF protection in objects/commentDelete.json.php enables mass comment deletion against moderators and content creators", "source": {"advisory": "GHSA-8qm8-g55h-xmqr", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "WWBN", "product": "AVideo", "versions": [{"status": "affected", "version": "<= 29.0"}]}], "references": [{"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr", "name": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/WWBN/AVideo/commit/184f36b1896f3364f864f17c1acca3dd8df3af27", "name": "https://github.com/WWBN/AVideo/commit/184f36b1896f3364f864f17c1acca3dd8df3af27", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/commentDelete.json.php` is a state-mutating JSON endpoint that deletes comments but performs no CSRF validation. It does not call `forbidIfIsUntrustedRequest()`, does not verify a CSRF/global token, and does not check `Origin`/`Referer`. Because AVideo intentionally sets `session.cookie_samesite=None` (to support cross-origin embed players), a cross-site request from any attacker-controlled page automatically carries the victim's `PHPSESSID`. Any authenticated victim who has authority to delete one or more comments (site moderators, video owners, and comment authors) can be tricked into deleting comments en masse simply by visiting an attacker page. Commit 184f36b1896f3364f864f17c1acca3dd8df3af27 contains a fix."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-352", "description": "CWE-352: Cross-Site Request Forgery (CSRF)"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-21T22:16:54.781Z"}}}, "cveMetadata": {"cveId": "CVE-2026-40929", "state": "PUBLISHED", "dateUpdated": "2026-04-22T17:58:51.253Z", "dateReserved": "2026-04-15T20:40:15.517Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-04-21T22:16:54.781Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "AVideo", "vendor": "WWBN", "versions": [{"status": "affected", "version": "<= 29.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*", "matchCriteriaId": "AC38CA07-71C1-4C86-B84A-83CF96367CBA", "versionEndIncluding": "29.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/commentDelete.json.php` is a state-mutating JSON endpoint that deletes comments but performs no CSRF validation. It does not call `forbidIfIsUntrustedRequest()`, does not verify a CSRF/global token, and does not check `Origin`/`Referer`. Because AVideo intentionally sets `session.cookie_samesite=None` (to support cross-origin embed players), a cross-site request from any attacker-controlled page automatically carries the victim's `PHPSESSID`. Any authenticated victim who has authority to delete one or more comments (site moderators, video owners, and comment authors) can be tricked into deleting comments en masse simply by visiting an attacker page. Commit 184f36b1896f3364f864f17c1acca3dd8df3af27 contains a fix."}, {"lang": "es", "value": "WWBN AVideo es una plataforma de video de c\u00f3digo abierto. En las versiones 29.0 y anteriores, objects/commentDelete.json.php es un endpoint JSON que muta el estado y elimina comentarios, pero no realiza validaci\u00f3n CSRF. No llama a forbidIfIsUntrustedRequest(), no verifica un token CSRF/global y no comprueba Origin/Referer. Debido a que AVideo establece intencionalmente session.cookie_samesite=None (para admitir reproductores incrustados de origen cruzado), una solicitud de sitio cruzado desde cualquier p\u00e1gina controlada por el atacante transporta autom\u00e1ticamente el PHPSESSID de la v\u00edctima. Cualquier v\u00edctima autenticada que tenga autoridad para eliminar uno o m\u00e1s comentarios (moderadores del sitio, propietarios de videos y autores de comentarios) puede ser enga\u00f1ada para eliminar comentarios en masa simplemente visitando una p\u00e1gina del atacante. El commit 184f36b1896f3364f864f17c1acca3dd8df3af27 contiene una soluci\u00f3n."}], "id": "CVE-2026-40929", "lastModified": "2026-10-26T22:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40929", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-22T17:58:28.716992Z", "version": "2.0.3"}}]}, "published": "2026-04-21T23:16:20.433", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/WWBN/AVideo/commit/184f36b1896f3364f864f17c1acca3dd8df3af27"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-352"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,29.0]"}}], "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": "2026-04-22T06:17:09.648860+00:00", "value": {"mitigation_remediation": ["Upgrade AVideo to the latest release that includes commit 184f36b1896f3364f864f17c1acca3dd8df3af27, which adds CSRF validation to the commentDelete endpoint.", "Verify that session.cookie_samesite is set to \"Lax\" or \"Strict\" in php.ini or application configuration; disabling \"None\" reduces CSRF risk.", "Review and enforce access controls on comment deletion endpoints; restrict calls to trusted origins and require a CSRF token for any state\u2011changing operation."], "summary": {"action": "Apply Patch", "impact": "Unauthorized mass comment deletion"}, "threat_synthesis": {"affected_systems": "Affects the open\u2011source video platform WWBN AVideo versions 29.0 and earlier. The fix is included in commit 184f36b1896f3364f864f17c1acca3dd8df3af27, so any deployment using a pre\u201129.0 release is vulnerable.", "description_and_impact": "The vulnerability resides in the objects/commentDelete.json.php endpoint and allows an authenticated user with comment deletion privilege to have comments removed by an attacker who tricks them into visiting a malicious page. The endpoint performs no CSRF validation, ignoring tokens, Origin, and Referer. Because the platform sets session.cookie_samesite=None, any cross\u2011site request silently supplies the victim\u2019s session cookie. An attacker can therefore delete comments en masse, undermining content integrity and potentially author reputation. The weakness aligns with CWE\u2011352 \"Cross\u2011Site Request Forgery\".", "risk_and_exploitability": "The vulnerability has a CVSS score of 5.4, indicating medium severity. EPSS is not available, so exploit likelihood cannot be quantified precisely, but the absence of CSRF checks and the platform\u2019s cookie settings make the attack straightforward. The vulnerability is not listed in CISA KEV, so it has not yet been observed in the wild. Attackers would need only a malicious web page and an authenticated user with delete rights; thus the attack vector is cross\u2011site request forgery, which is commonly feasible in a modern browser environment."}}}}, "created": "2026-04-22T03:45:06.828571+00:00", "updated": "2026-04-22T06:30:10.664761+00:00", "vendors": ["wwbn", "wwbn$PRODUCT$avideo"]}