CVE-2025-61637CWE-79

Stored XSS through system messages in MW Core

published February 2, 2026

CVSS v4.0
0.0
EPSS
0%
Percentile
16.1
In the wild
Unconfirmed
What it is

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Action/mediawiki.Action.Edit.Preview.Js, resources/src/mediawiki.Page.Preview.Js.

This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1.

The record
Technical detail
CVSS v4.0
0.0 · NONE
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
EPSS
0.00255 · 16.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-02T23:54Z
EPSS history
Timeline
  • 02 FEB 23:54Z
    Stored XSS through system messages in MW Core
    cvelistv5