---
id: CVE-2026-116883
title: Semantic MediaWiki 3.1.0 before 7.3.1 Stored XSS via Schema Descriptions
summary: >-
  Semantic MediaWiki from 3.1.0 before 7.3.1 contains a stored cross-site
  scripting vulnerability that allows authenticated schema editors to inject
  HTML through schema descriptions. Attackers with the smw-schemaedit permission
  can save HT…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: SemanticMediaWiki
product: SemanticMediaWiki
affected:
  - SemanticMediaWiki >= 3.1.0 < 7.3.1
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T10:26:46.130Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116883'
references:
  - url: >-
      https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-2xr9-cr6h-wr6m
    label: GitHub Security Advisory (GHSA-2xr9-cr6h-wr6m)
  - url: >-
      https://www.vulncheck.com/advisories/semantic-mediawiki-3.1.0-before-7.3.1-stored-xss-via-schema-descriptions
    label: >-
      VulnCheck Advisory: Semantic MediaWiki 3.1.0 before 7.3.1 Stored XSS via
      Schema Descriptions
tags:
  - cve.org
ingestedAt: '2026-10-27T16:11:59.290Z'
---

## Overview

Semantic MediaWiki from 3.1.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows authenticated schema editors to inject HTML through schema descriptions. Attackers with the smw-schemaedit permission can save HTML that is passed unescaped to Html::rawElement() in HtmlBuilder, altering pages and targeting users who view the schema.

## Affected

- `SemanticMediaWiki >= 3.1.0 < 7.3.1`

## Remediation

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