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Advisory record · GHSA-9rcc-pmj8-ffhr

Semantic MediaWiki's Special:FacetedSearch cstate hidden inputs enable reflected XSS (residual of CVE-2025-10354)

CVSS 5.1 MediumEPSS 0.0017 · 6th percentile

Published by the GitHub Advisory Database at 18 Sept 2026, 16:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
mediawiki/semantic-media-wikiPackagist>=4.2.0, <7.2.17.2.1
Identifiers
GHSA-9rcc-pmj8-ffhr · CVE-2026-116891 · PKSA-rt5h-3dwq-vdnx
Weakness (CWE)
CWE-79
Tags
Published
18 Sept 2026
Updated
28 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Semantic MediaWiki versions 4.2.0 up to but not including 7.2.1 are affected by a reflected cross-site scripting issue in Special:FacetedSearch, where values in the cstate request parameters are inserted into the page without HTML escaping. A remote attacker can craft a URL that sets the required query parameters, so a victim who opens the link may have script run in the wiki's origin. The source's proposed rating is CVSS 3.1 Medium, but no official severity is given. Upgrade to version 7.2.1, which is listed as the fixed release.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.1 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0017, the 6th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 27 Oct 2026, 10:23 UTC Confirmed by the CVE List
  2. 27 Oct 2026, 11:17 UTC Confirmed by NVD
  3. 31 Oct 2026, 13:53 UTC First seen by agentprime
  4. 31 Oct 2026, 13:53 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.