CVE-2025-65858: Janeczku Calibre-Web

Low severity, CVSS 3.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A Stored Cross-Site Scripting (XSS) vulnerability in Calibre-Web v0.6.25 allows attackers to inject malicious JavaScript into the 'username' field during user creation. The payload is stored unsanitized and later executed when the /ajax/listusers endpoint is accessed.

Affected products

• Janeczku Calibre-Web: version 0.6.25 only

Published 2025-12-02. Last modified 2026-06-17.