CVE-2026-43877

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{"affected": [{"affectedData": [{"product": "AVideo", "vendor": "WWBN", "versions": [{"status": "affected", "version": "<= 29.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/userSavePhoto.php is a legacy profile-photo endpoint that accepts a base64 POST parameter and writes the decoded bytes to videos/userPhoto/photo<users_id>.png. Its only access control is User::isLogged(). It does not end in .json.php, so it is excluded from the project's global autoCSRFGuard (which is suffix-scoped in objects/include_config.php). There is no CSRF token, no Origin/Referer check, and no MIME validation of the decoded bytes. Because AVideo's default cookie policy is SameSite=None; Secure on HTTPS (objects/functionsPHP.php:227), an attacker who lures a logged-in user to a malicious page can overwrite that user's profile photo with arbitrary bytes and also triggers a site-wide clearCache(true) on every forged request. Commit 9c38468041505e637101c5943c5370c68f48e3ac contains an updated fix."}, {"lang": "es", "value": "WWBN AVideo es una plataforma de video de c\u00f3digo abierto. En versiones hasta la 29.0 inclusive, objects/userSavePhoto.php es un endpoint heredado para fotos de perfil que acepta un par\u00e1metro POST base64 y escribe los bytes decodificados en videos/userPhoto/photo[users_id].png. Su \u00fanico control de acceso es User::isLogged(). No termina en .json.php, por lo que est\u00e1 excluido del autoCSRFGuard global del proyecto (el cual tiene un alcance por sufijo en objects/include_config.php). No hay token CSRF, no hay verificaci\u00f3n de Origin/Referer, y no hay validaci\u00f3n MIME de los bytes decodificados. Debido a que la pol\u00edtica de cookies predeterminada de AVideo es SameSite=None; Secure en HTTPS (objects/functionsPHP.php:227), un atacante que atrae a un usuario autenticado a una p\u00e1gina maliciosa puede sobrescribir la foto de perfil de ese usuario con bytes arbitrarios y tambi\u00e9n activa un clearCache(true) en todo el sitio en cada solicitud forjada. El commit 9c38468041505e637101c5943c5370c68f48e3ac contiene una correcci\u00f3n actualizada."}], "id": "CVE-2026-43877", "lastModified": "2026-10-26T18:10:00.173", "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-2026-43877", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-12T16:36:34.990206Z", "version": "2.0.3"}}]}, "published": "2026-05-11T22:22:12.113", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/commit/9c38468041505e637101c5943c5370c68f48e3ac"}, {"source": "security-advisories@github.com", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-jw8g-5j46-44rp"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-jw8g-5j46-44rp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "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"}], "created": "2026-05-11T22:45:36.084778+00:00", "updated": "2026-05-11T23:30:02.959588+00:00", "vendors": ["wwbn", "wwbn$PRODUCT$avideo"], "weaknesses": ["CWE-352"]}