CVE-2026-89239CWE-79cross-site-scripting

CVE-2026-89239

Medium · published September 11, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
17.1
In the wild
Unconfirmed
What it is

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a reflected cross-site scripting vulnerability in the showAlertMessage() function that inserts the raw Referer header into a JavaScript comment without encoding. Attackers can craft a Referer header containing */ to close the comment and inject arbitrary JavaScript that executes in the site origin for visitors arriving from the attacker-controlled page.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00263 · 17.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-11T16:16Z
References (2)
https://github.com/WWBN/AVideo/security/advisories/GHSA-3pp9-g99w-qw3j · [email protected]https://www.vulncheck.com/advisories/wwbn-avideo-reflected-xss-via-referer-header-comment-breakout · [email protected]
EPSS history
Timeline
  • 13 SEP 03:23Z
    EPSS moved — → 0%
    epss
  • 11 SEP 11:15Z
    WWBN AVideo Reflected XSS via Referer Header Comment Breakout
    cvelistv5