CVE-2025-40647: Issabel, Issabel-Agenda Module Issabel

Medium severity, CVSS 5.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Stored Cross-Site Scripting (XSS) vulnerability in Issabel v5.0.0, consisting of a stored XSS due to a lack of proper validation of user input, through the 'email' parameter in '/index.php?menu=address_book'.

Affected products

• Issabel, Issabel-Agenda Module Issabel: before 5.0.0-4 (fixed in 5.0.0-4)
• Issabel-Pbx Module Issabel: before 5.0.0-2 (fixed in 5.0.0-2)

Published 2025-10-01. Last modified 2026-06-17.