CVE-2025-67723 – Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin

CVE ID : CVE-2025-67723

Published : Jan. 28, 2026, 6:21 p.m. | 46 minutes ago

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.

Severity: 0.0 | NA

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