CVE-2025-40632: Icewarp Mail Server

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) in Icewarp Mail Server affecting version 11.4.0. This vulnerability allows an attacker to modify the “lastLogin” cookie with malicious JavaScript code that will be executed when the page is rendered.

Affected products

• Icewarp Mail Server: version 11.4.0 only

Published 2025-05-16. Last modified 2026-06-17.