---
id: CVE-2026-116886
title: >-
  Semantic MediaWiki before 7.3.1 Stored XSS via External Identifier in
  Special:Browse
summary: >-
  Semantic MediaWiki from 2.5.0 before 7.3.1 contains a stored cross-site
  scripting vulnerability that allows users with page-edit rights to inject
  scripts via External identifier property values. Attackers can annotate markup
  payloads tha…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: SemanticMediaWiki
product: SemanticMediaWiki
affected:
  - SemanticMediaWiki >= 2.5.0 < 7.3.1
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-27T13:46:23.578441Z'
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T14:13:01.153Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116886'
references:
  - url: >-
      https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2gfw-3hj2-wfq5
    label: GitHub Security Advisory (GHSA-2gfw-3hj2-wfq5)
  - url: >-
      https://www.vulncheck.com/advisories/semantic-mediawiki-before-7.3.1-stored-xss-via-external-identifier-in-special-browse
    label: >-
      VulnCheck Advisory: Semantic MediaWiki before 7.3.1 Stored XSS via
      External Identifier in Special:Browse
tags:
  - cve.org
ingestedAt: '2026-10-27T16:11:59.437Z'
---

## Overview

Semantic MediaWiki from 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject scripts via External identifier property values. Attackers can annotate markup payloads that ExternalIdentifierValue renders unescaped on Special:Browse, executing JavaScript in viewers' sessions, including administrators.

## Affected

- `SemanticMediaWiki >= 2.5.0 < 7.3.1`

## Remediation

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