Vulnerability · Published Oct 27, 2026 · Assigned by VulnCheck

CVE-2026-116888SemanticMediaWiki 3.2.0 before 7.3.1 Stored XSS via Special:Browse Group Heading

Medium 4.8

In plain English

A medium-severity cross-site scripting in SemanticMediaWiki from SemanticMediaWiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.1%top 96.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
SemanticMediaWiki	SemanticMediaWiki	3.2.0 – before 7.3.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-fp94-c5vh-cmhp) vendor-advisory
VulnCheck Advisory: SemanticMediaWiki 3.2.0 before 7.3.1 Stored XSS via Special:Browse Group Heading third-party-advisory