CVE-2023-43319: Icewarp Webclient

Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Cross Site Scripting (XSS) vulnerability in the Sign-In page of IceWarp WebClient 10.3.5 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the username parameter.

Affected products

• Icewarp Webclient: version 10.3.5 only

Published 2023-09-25. Last modified 2026-06-17.