CVE-2025-67723

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.

CVSS v3 4.6 MEDIUM

4.6^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.1 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/discourse/discourse/security/advisories/GHSA-955h-m28g-5379	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:discourse:discourse:::::stable:::*
	cpe:2.3:a:discourse:discourse:::::stable:::*
	cpe:2.3:a:discourse:discourse:2025.12.0::::stable:::

History

No history.

Information

Published : 2026-01-28 19:16

Updated : 2026-02-09 17:40

NVD link : CVE-2025-67723

Mitre link : CVE-2025-67723

CVE.ORG link : CVE-2025-67723

JSON object : View

Products Affected

discourse

discourse

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2025-67723", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.6, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 2.5, "exploitabilityScore": 2.1}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}]}, "published": "2026-01-28T19:16:22.640", "references": [{"url": "https://github.com/discourse/discourse/security/advisories/GHSA-955h-m28g-5379", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Discourse es una plataforma de discusi\u00f3n de c\u00f3digo abierto. Las versiones anteriores a 3.5.4, 2025.11.2, 2025.12.1 y 2026.1.0 tienen una vulnerabilidad de scripting entre sitios mitigada por pol\u00edtica de seguridad de contenido en el plugin Discourse Math cuando se utiliza su variante KaTeX. Este problema est\u00e1 parcheado en las versiones 3.5.4, 2025.11.2, 2025.12.1 y 2026.1.0. Como soluci\u00f3n alternativa, se puede deshabilitar el plugin Discourse Math, o se puede usar el proveedor Mathjax en lugar de KaTeX."}], "lastModified": "2026-02-09T17:40:37.820", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*", "vulnerable": true, "matchCriteriaId": "FDBF21E2-1191-4020-A17A-0702DE4E6451", "versionEndExcluding": "3.5.4"}, {"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*", "vulnerable": true, "matchCriteriaId": "539B5B85-44F0-408E-B994-08BB20EA9C26", "versionEndExcluding": "2025.11.2", "versionStartIncluding": "2025.11.0"}, {"criteria": "cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:*", "vulnerable": true, "matchCriteriaId": "CCBF47A8-0D3F-4174-8084-CD3517BF272A"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}