What’s Vulnerable › Vulnerabilities

CVE-2026-116884: SemanticMediaWiki 5.0.0 before 7.3.1 Stored XSS via Tooltip Module data-* Attributes

• 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 2026-10-31
• Weakness: CWE-79

Description

SemanticMediaWiki from 5.0.0 before 7.3.1 contains a stored cross-site scripting vulnerability in ext.smw.tooltip.tippy.js that renders data-* attributes via innerHTML with allowHTML enabled. Editors can plant a .smw-highlighter span with a malicious data-content, data-title, data-top, data-bottom, or data-theme attribute to execute JavaScript when viewers, including administrators, hover it.

Affected products

• Semantic-Mediawiki Semantic Mediawiki: from 5.0.0 before 7.3.1 — fixed in 7.3.1
• SemanticMediaWiki: from 5.0.0 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-4wj6-wmjp-pmhh
• https://www.vulncheck.com/advisories/semanticmediawiki-5.0.0-before-7.3.1-stored-xss-via-tooltip-module-data-attributes
• https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-4wj6-wmjp-pmhh

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