CVE-2025-67723 — Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin
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 vulner…
Published: 2026-01-28 · CVSS: 4.6 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7