{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23630", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-01-14T16:08:37.482Z", "datePublished": "2026-01-21T22:51:27.158Z", "dateUpdated": "2026-01-22T16:49:01.024Z"}, "containers": {"cna": {"title": "Docmost is vulnerable to stored Cross-Site Scripting (XSS) through Mermaid rendering", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-116", "lang": "en", "description": "CWE-116: Improper Encoding or Escaping of Output", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/docmost/docmost/security/advisories/GHSA-r4hj-mc62-jmwj", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/docmost/docmost/security/advisories/GHSA-r4hj-mc62-jmwj"}, {"name": "https://github.com/docmost/docmost/commit/cb9f27da9a8b4940760e37e5238a1eb91e427daf", "tags": ["x_refsource_MISC"], "url": "https://github.com/docmost/docmost/commit/cb9f27da9a8b4940760e37e5238a1eb91e427daf"}, {"name": "https://github.com/docmost/docmost/releases/tag/v0.24.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/docmost/docmost/releases/tag/v0.24.0"}], "affected": [{"vendor": "docmost", "product": "docmost", "versions": [{"version": ">= 0.3.0, < 0.24.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-01-21T22:51:27.158Z"}, "descriptions": [{"lang": "en", "value": "Docmost is open-source collaborative wiki and documentation software. In versions 0.3.0 through 0.23.2, Mermaid code block rendering is vulnerable to stored Cross-Site Scripting (XSS). The frontend can render attacker-controlled Mermaid diagrams using mermaid.render(), then inject the returned SVG/HTML into the DOM via dangerouslySetInnerHTML without sanitization. Mermaid per-diagram %%{init}%% directives allow overriding securityLevel and enabling htmlLabels, permitting arbitrary HTML/JS execution for any viewer. This issue has been fixed in version 0.24.0."}], "source": {"advisory": "GHSA-r4hj-mc62-jmwj", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-22T15:09:16.399808Z", "id": "CVE-2026-23630", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-22T16:49:01.024Z"}}]}}

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