CVE-2025-6596CWE-79

Vector inserts portlet labels as HTML, allowing for stored XSS through system messages

published February 2, 2026

CVSS v4.0
0.0
EPSS
0%
Percentile
37.1
In the wild
Unconfirmed
What it is

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Vector. This vulnerability is associated with program files resources/skins.Vector.Js/portlets.Js, resources/skins.Vector.Legacy.Js/portlets.Js.

This issue affects Vector: from >= 1.40.0 before 1.42.7, 1.43.2, 1.44.0.

The record
Technical detail
CVSS v4.0
0.0 · NONE
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00439 · 37.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-02T22:58Z
EPSS history
Timeline
  • 02 FEB 22:58Z
    Vector inserts portlet labels as HTML, allowing for stored XSS through system messages
    cvelistv5