XSS in Semanticmediawiki
CVE-2026-116888
SemanticMediaWiki from 3.2.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with the smw-schemaedit right to inject markup through an unescaped property group schema canonical_name. Attackers can save a schema whose canonical_name holds script markup, which GroupFormatter renders unescaped in Special:Browse headings, executing JavaScript in viewers' sessions including administrators.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-fp94-c5… (vendor-advisory)
- www.vulncheck.com/advisories/semanticmediawiki-3.2.0-before-7.3.1-stored-xss-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116888?
- CVE-2026-116888 is a medium-severity vulnerability in Semanticmediawiki, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-10-27.
- How severe is CVE-2026-116888?
- Medium severity. CVSS v3 base score is 4.8 out of 10.