CVE-2026-23630

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/docmost/docmost/commit/cb9f27da9a8b4940760e37e5238a1eb91e427daf	Patch
https://github.com/docmost/docmost/releases/tag/v0.24.0	Product Release Notes
https://github.com/docmost/docmost/security/advisories/GHSA-r4hj-mc62-jmwj	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:docmost:docmost:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-01-21 23:15

Updated : 2026-02-17 16:50

NVD link : CVE-2026-23630

Mitre link : CVE-2026-23630

CVE.ORG link : CVE-2026-23630

JSON object : View

Products Affected

docmost

docmost

CWE

CWE-79

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

CWE-116

Improper Encoding or Escaping of Output

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