Vulnerability · Published Oct 27, 2026 · Assigned by VulnCheck

CVE-2026-116889SemanticMediaWiki 2.5.0 before 7.3.1 Stored XSS via Special:Browse Code Property

Medium 6.1

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 0.2% (higher than 5% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.2%top 94.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

SemanticMediaWiki from 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject script through Code-typed property values. Attackers can annotate a valid JSON value embedding HTML markup, which the CodeStringValueFormatter renders unescaped on Special:Browse, executing JavaScript in viewers' sessions.

Affected products (as reported)

Vendor	Product	Versions
SemanticMediaWiki	SemanticMediaWiki	2.5.0 – before 7.3.1

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

References

GitHub Security Advisory (GHSA-6v7f-crgp-hhvp) vendor-advisory
VulnCheck Advisory: SemanticMediaWiki 2.5.0 before 7.3.1 Stored XSS via Special:Browse Code Property third-party-advisory