{"id":"CVE-2025-67723","aliases":["BIT-discourse-2025-67723","EUVD-2025-206450","GHSA-955h-m28g-5379"],"status":"published","title":"Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin","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":{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00217,"percentile":0.12222,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-01-28T18:21:35Z","modified":"2026-11-05T21:30:56Z","fixes":[{"ecosystem":"Bitnami","package":"discourse","fixed_in":["3.5.4","2025.11.2","2025.12.1","2026.1.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"discourse","ranges":[{"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"}]}]}],"products":[{"vendor":"discourse","product":"discourse"}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-955h-m28g-5379","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-67723","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/67xxx/CVE-2025-67723.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-67723","title":"Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin","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.","status":"published","published":"2026-01-28T18:21:35.379Z","modified":"2026-01-28T19:28:24.714Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:52.21763Z"}],"euvd":[{"id":"EUVD-2025-206450","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.","status":"published","published":"2026-01-28T18:21:35Z","modified":"2026-01-28T19:28:24Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T19:48:46.416428Z"}],"nvd":[{"id":"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.","status":"published","published":"2026-01-28T19:16:22.64Z","modified":"2026-06-17T09:58:02.12Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:11:59.073638Z"}],"osv":[{"id":"CVE-2025-67723","title":"Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin","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.","status":"published","published":"2026-01-28T18:21:35.379Z","modified":"2026-11-05T21:30:56.903528225Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-05T22:00:34.245765Z"},{"id":"BIT-discourse-2025-67723","title":"Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin","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.","status":"published","published":"2026-02-02T08:42:10.509Z","modified":"2026-09-08T08:45:52.722151635Z","updated_at":"2026-11-02T15:28:29.152062Z"}]}}