Unrated severityOSV Advisory· Published Jan 28, 2026· Updated Jan 28, 2026
Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin
CVE-2025-67723
Description
Discourse is an open source discussion platform. Versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 have a content-security-policy-mitigated cross-site scriptinv vulnerability on the Discourse Math plugin when using its KaTeX variant. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. As a workaround, the Discourse Math plugin can be disabled, or the Mathjax provider can be used instead of KaTeX.
AI Insight
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Affected products
3beta, latest-release, release, …+ 1 more
- (no CPE)range: beta, latest-release, release, …
- (no CPE)range: <3.5.4, <2025.11.2, <2025.12.1, <2026.1.0
Patches
Vulnerability mechanics
References
1- github.com/discourse/discourse/security/advisories/GHSA-955h-m28g-5379mitrex_refsource_CONFIRM
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