What’s Vulnerable › Vulnerabilities

CVE-2026-116874: SemanticMediaWiki 3.1.0 before 7.3.1 Reflected XSS via JsonResultPrinter Default Parameter

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-27 · updated 2026-10-28
• Weakness: CWE-79

Description

SemanticMediaWiki from 3.1.0 before 7.3.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the unescaped default parameter in JsonResultPrinter. Attackers can lure victims to a crafted Special:Ask link with a zero-result query and request_type=special_page, executing JavaScript in the wiki origin to steal sessions or CSRF tokens.

Affected products

• Semantic-Mediawiki Semantic Mediawiki: from 3.1.0 before 7.3.1 — fixed in 7.3.1
• SemanticMediaWiki: from 3.1.0 before 7.3.1 — fixed in 7.3.1

How to fix

Upgrade to a fixed version: Semantic-Mediawiki Semantic Mediawiki 7.3.1; SemanticMediaWiki 7.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-574v-j8hf-88h3
• https://www.vulncheck.com/advisories/semanticmediawiki-3.1.0-before-7.3.1-reflected-xss-via-jsonresultprinter-default-parameter

Get alerted when CVE-2026-116874 or the next vulnerability affects your stack