---
id: CVE-2026-103051
title: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') vulnerability in The Wikimedia Foundation Mediawiki -
  CentralNotice extension allows Stored XSS.


  This issue affects Mediawiki - CentralNotice extension…
summary: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') vulnerability in The Wikimedia Foundation Mediawiki -
  CentralNotice extension allows Stored XSS.


  This issue affects Mediawiki - CentralNotice extension…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: The Wikimedia Foundation
product: Mediawiki - CentralNotice extension
affected:
  - 'mediawiki_-_centralnotice_extension < 1.46.1, 1.45.5, 1.43.10'
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T21:17:08.430'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103051'
references:
  - url: >-
      https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CentralNotice/+/1346103
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
  - url: 'https://phabricator.wikimedia.org/T432419'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-30T18:14:10.990416Z'
epss: 0.00155
epssPercentile: 0.0453
ingestedAt: '2026-09-29T23:52:50.544Z'
---

## Overview

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

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.