CVE-2026-103050CWE-79cross-site-scripting

CVE-2026-103050

Medium · published September 30, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
4.2
In the wild
Unconfirmed
What it is

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS.

This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.

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
Not supplied
EPSS
0.00155 · 4.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-30T04:16Z
References (2)
https://gerrit.wikimedia.org/r/c/1346089 · c4f26cc8-17ff-4c99-b5e2-38fc1793eacchttps://phabricator.wikimedia.org/T432341 · c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
EPSS history
Timeline
  • 01 OCT 03:44Z
    EPSS moved — → 0%
    epss
  • 29 SEP 23:11Z
    Stored i18n XSS in MassMessage
    cvelistv5