What is CVE-2026-116139?

CVE-2026-116139 is a medium-severity vulnerability in Wwbn Avideo, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-25.

How severe is CVE-2026-116139?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Wwbn Avideo

CVE-2026-116139

WWBN AVideo 26.0 through 29.3.0 contains a stored cross-site scripting vulnerability that allows authenticated commenters to inject JavaScript because markDownToHTML() preserves event-handler attributes in leading HTML blocks. Attackers can post a comment starting with an img tag carrying an onerror handler, which bypasses the inline sanitizer and executes in viewers' browsers under the application origin.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-25 · last modified 2026-10-25.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Wwbn Avideo

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/WWBN/AVideo/security/advisories/GHSA-cx46-26xc-2w7f (vendor-advisory)
github.com/WWBN/AVideo/commit/f13587c59346b4bf0f449273021d29b869594559 (patch)
www.vulncheck.com/advisories/wwbn-avideo-26.0-through-29.3.0-stored-xss-via-com… (third-party-advisory)

Frequently asked questions

What is CVE-2026-116139?: CVE-2026-116139 is a medium-severity vulnerability in Wwbn Avideo, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-25.
How severe is CVE-2026-116139?: Medium severity. CVSS v3 base score is 5.4 out of 10.