CVE-2013-4669: Fortinet FortiClient

Medium severity, CVSS 5.4. EPSS: 0.9% chance of exploitation in the next 30 days.

FortiClient before 4.3.5.472 on Windows, before 4.0.3.134 on Mac OS X, and before 4.0 on Android; FortiClient Lite before 4.3.4.461 on Windows; FortiClient Lite 2.0 through 2.0.0223 on Android; and FortiClient SSL VPN before 4.0.2258 on Linux proceed with an SSL session after determining that the server's X.509 certificate is invalid, which allows man-in-the-middle attackers to obtain sensitive information by leveraging a password transmission that occurs before the user warning about the certificate problem.

Affected products

• Fortinet FortiClient: up to and including 4.3.3.445; up to and including 4.0.2
• Fortinet FortiClient Lite: up to and including 4.3.3.445; up to and including 2.0
• Fortinet FortiClient SSL VPN: up to and including 4.0.2012

Published 2013-06-25. Last modified 2026-06-16.