Discourse vulnerable to stored Cross-site Scripting via Kate… (CVE-2025-67723)

Summary

Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin

Original description

The description as published by the source.

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: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

Affected packages

Bitnami discourse

[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.5.4"},{"introduced":"2025.11.0"},{"fixed":"2025.11.2"},{"introduced":"2025.12.0"},{"fixed":"2025.12.1"},{"introduced":"2026.1.0"},{"fixed":"2026.1.0"}]}]

References

advisory github.com
web nvd.nist.gov