---
id: CVE-2026-103443
title: >-
  Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
  vulnerability in The Wikimedia Foundation MediaWiki Collection (Book)
  extension allows XSS Targeting Non-Script Elements.


  This issue affects MediaWiki Collect…
summary: >-
  Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
  vulnerability in The Wikimedia Foundation MediaWiki Collection (Book)
  extension allows XSS Targeting Non-Script Elements.


  This issue affects MediaWiki Collect…
severity: low
cvss: 1.1
cvssVector: >-
  CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
cwe:
  - CWE-80
vendor: The Wikimedia Foundation
product: MediaWiki Collection (Book) extension
affected:
  - mediawiki_collection_book_extension 1.46
  - mediawiki_collection_book_extension 1.45
  - mediawiki_collection_book_extension 1.43
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T17:31:44.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103443'
references:
  - url: 'https://gerrit.wikimedia.org/r/q/I51d973d4ace99fb6e584296f296efb0ff50339ce'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
  - url: 'https://phabricator.wikimedia.org/T435822'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-30T17:13:20.841Z'
---

## Overview

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Collection (Book) extension allows XSS Targeting Non-Script Elements.

This issue affects MediaWiki Collection (Book) extension: 1.46, 1.45, and 1.43.

## Remediation

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