---
id: CVE-2026-116891
title: >-
  SemanticMediaWiki 4.2.0 before 7.2.1 Reflected XSS via Special:FacetedSearch
  cstate
summary: >-
  SemanticMediaWiki from 4.2.0 before 7.2.1 contains a reflected cross-site
  scripting vulnerability that allows unauthenticated attackers to inject HTML
  via unescaped cstate parameters in Special:FacetedSearch. Attackers can craft
  URLs wit…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: SemanticMediaWiki
product: SemanticMediaWiki
affected:
  - SemanticMediaWiki >= 4.2.0 < 7.2.1
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T10:26:51.529Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116891'
references:
  - url: >-
      https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-9rcc-pmj8-ffhr
    label: GitHub Security Advisory (GHSA-9rcc-pmj8-ffhr)
  - url: >-
      https://www.vulncheck.com/advisories/semanticmediawiki-4.2.0-before-7.2.1-reflected-xss-via-special-facetedsearch-cstate
    label: >-
      VulnCheck Advisory: SemanticMediaWiki 4.2.0 before 7.2.1 Reflected XSS via
      Special:FacetedSearch cstate
tags:
  - cve.org
ingestedAt: '2026-10-27T16:11:59.293Z'
---

## Overview

SemanticMediaWiki from 4.2.0 before 7.2.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject HTML via unescaped cstate parameters in Special:FacetedSearch. Attackers can craft URLs with q, a matching crc32 csum or filtered=1, and cstate values that break out of hidden input attributes to execute script in victims' browsers.

## Affected

- `SemanticMediaWiki >= 4.2.0 < 7.2.1`

## Remediation

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