---
id: CVE-2026-103584
title: >-
  Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
  vulnerability in The Wikimedia Foundation MediaWiki CommonsMetadata extension
  allows Cross-Site Scripting (XSS).


  This issue affects MediaWiki CommonsMetadata …
summary: >-
  Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
  vulnerability in The Wikimedia Foundation MediaWiki CommonsMetadata extension
  allows Cross-Site Scripting (XSS).


  This issue affects MediaWiki CommonsMetadata …
severity: low
cvss: 1.1
cvssVector: >-
  CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:C/RE:M/U:Amber
cwe:
  - CWE-80
vendor: The Wikimedia Foundation
product: MediaWiki CommonsMetadata extension
affected:
  - mediawiki_commonsmetadata_extension 1.46
  - mediawiki_commonsmetadata_extension 1.45
  - mediawiki_commonsmetadata_extension 1.43
published: '2026-09-30'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T16:17:36.807'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103584'
references:
  - url: 'https://gerrit.wikimedia.org/r/q/I66c102cae36a9d499c95c37db7458371c7c87258'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
  - url: 'https://phabricator.wikimedia.org/T435999'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
tags:
  - nvd
  - cve.org
  - exploit-available
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-01T15:52:52.080179Z'
cvssSource: cna
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/BomboBombone/CVE-2026-103584'
  checkedAt: '2026-10-27T16:53:49.875Z'
exploitAvailable: true
ingestedAt: '2026-09-30T22:27:27.821Z'
epss: 0.00285
epssPercentile: 0.20872
---

## Overview

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki CommonsMetadata extension allows Cross-Site Scripting (XSS).

This issue affects MediaWiki CommonsMetadata extension: 1.46, 1.45, and 1.43.

## Remediation

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