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.
Advisories

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Wed, 28 Jan 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 28 Jan 2026 18:45:00 +0000

Type Values Removed Values Added
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.
Title Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-28T19:28:24.714Z

Reserved: 2025-12-10T19:25:20.819Z

Link: CVE-2025-67723

cve-icon Vulnrichment

Updated: 2026-01-28T19:05:30.341Z

cve-icon NVD

Status : Received

Published: 2026-01-28T19:16:22.640

Modified: 2026-01-28T19:16:22.640

Link: CVE-2025-67723

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses