---
id: CVE-2025-62656
title: >-
  Improper Neutralization of Input During Web Page Generation (XSS or
  'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki
  GlobalBlocking extension allows Stored XSS.This issue affects MediaWiki
  GlobalBlocking extens…
summary: >-
  Improper Neutralization of Input During Web Page Generation (XSS or
  'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki
  GlobalBlocking extension allows Stored XSS.This issue affects MediaWiki
  GlobalBlocking extens…
severity: none
cwe:
  - CWE-79
published: '2025-10-20'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:10:00.563'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62656'
references:
  - url: 'https://phabricator.wikimedia.org/T403291'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
tags:
  - nvd
epss: 0.00269
epssPercentile: 0.17487
ingestedAt: '2026-10-08T22:11:53.825Z'
---

## Overview

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki GlobalBlocking extension allows Stored XSS.This issue affects MediaWiki GlobalBlocking extension: 1.43, 1.44.

## Remediation

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