What’s Vulnerable › Vulnerabilities

CVE-2025-61682: Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-10-14
• Weakness: CWE-79

Description

Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Versions starting in 3.1.0 and prior to 7.0.0 insert the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Version 7.0.0 patches the issue.

Affected products

• SemanticMediaWiki: from 3.1.0, < 7.0.0

References

• https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.0.0
• https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-hg8h-557g-q8pp
• https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-hg8h-557g-q8pp

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