CVE-2026-40479 — Kimai: Stored XSS via Incomplete HTML Attribute Escaping in Team Member Widget
Kimai is an open-source time tracking application. In versions 1.16.3 through 2.52.0, the escapeForHtml() function in KimaiEscape.js does not escape double quote or single quote…
Published: 2026-04-17 · CVSS: 5.4 · CVSS 3.1
Kimai is an open-source time tracking application. In versions 1.16.3 through 2.52.0, the escapeForHtml() function in KimaiEscape.js does not escape double quote or single quote characters. When a user's profile alias is inserted into an HTML attribute context via the team member form prototype and rendered through innerHTML, this incomplete escaping allows HTML attribute injection. An authenticated user with ROLE_USER privileges can store a malicious alias that executes JavaScript in the browser of any administrator viewing the team form, resulting in stored XSS with privilege escalation. This issue has been fixed in version 2.53.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7