---
id: CVE-2025-62670
title: >-
  Improper Neutralization of Input During Web Page Generation (XSS or
  'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki -
  FlexDiagrams Extension allows Stored XSS.This issue affects Mediawiki -
  FlexDiagrams Extens…
summary: >-
  Improper Neutralization of Input During Web Page Generation (XSS or
  'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki -
  FlexDiagrams Extension allows Stored XSS.This issue affects Mediawiki -
  FlexDiagrams Extens…
severity: none
cwe:
  - CWE-79
published: '2025-10-18'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T10:10:00.193'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62670'
references:
  - url: >-
      https://gerrit.wikimedia.org/r/c/mediawiki/extensions/FlexDiagrams/+/1179692
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
  - url: 'https://phabricator.wikimedia.org/T402149'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
  - url: 'https://phabricator.wikimedia.org/T402149'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00449
epssPercentile: 0.36977
ingestedAt: '2026-10-09T12:53:29.172Z'
---

## Overview

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - FlexDiagrams Extension allows Stored XSS.This issue affects Mediawiki - FlexDiagrams Extension: master.

## Remediation

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