Description
Legora before 2026-08-14 contains a cross-site scripting vulnerability that allows attackers to achieve arbitrary JavaScript execution in a victim-s browser by embedding a Mermaid block prefixed with a gray-matter JavaScript front-matter directive, causing the front-matter parser to invoke eval() before any SVG sanitization occurs. Attackers can exploit this flaw through influenced Mermaid diagram content to execute arbitrary JavaScript in the user-s browser context, with elevated impact on Word and Outlook add-in surfaces where bearer session tokens are persisted in localStorage.
CVSS 7.7EPSS 0.27999999999999997%Risk 0.79
View source- Published
- 2026-08-17 20:16:46
- Affected versions
- unknown
- Type
- Library
- Last modified
- 2026-08-21 20:16:40
- Vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N