What is CVE-2026-33043?

CVE-2026-33043 is a high-severity vulnerability in Wwbn Avideo, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 8.1/10. Published 2026-03-20.

How severe is CVE-2026-33043?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Wwbn Avideo

CVE-2026-33043

WWBN AVideo is an open source video platform. In versions 25.0 and below, /objects/phpsessionid.json.php exposes the current PHP session ID to any unauthenticated request. The allowOrigin() function reflects any Origin header back in Access-Control-Allow-Origin with Access-Control-Allow-Credentials: true, enabling cross-origin session theft and full account takeover. This issue has been fixed in version 26.0.

EPSS: 0.003 (27.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Wwbn Avideo — versions < 26.0

Weakness classification (CWE)

CWE-942 — Permissive Cross-domain Policy with Untrusted Domains

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33043?: CVE-2026-33043 is a high-severity vulnerability in Wwbn Avideo, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 8.1/10. Published 2026-03-20.
How severe is CVE-2026-33043?: High severity. CVSS v3 base score is 8.1 out of 10.