What’s Vulnerable › Vulnerabilities

CVE-2013-4669

• Severity: medium (CVSS 5.4 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2013-06-25 · updated 2026-06-16
• Weakness: CWE-255

Description

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 FortiClientWindows: through 4.3.3.445; through 4.0.2
• Fortinet Forticlient Lite: through 4.3.3.445; through 2.0
• Fortinet Forticlient Ssl Vpn: through 4.0.2012

References

• http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0001.html
• http://objectif-securite.ch/forticlient_bulletin.php
• http://www.fortiguard.com/advisory/Potential-Man-In-The-Middle-Vulnerability-in-FortiClient-VPN/
• http://www.securityfocus.com/bid/59604
• http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0001.html
• http://objectif-securite.ch/forticlient_bulletin.php
• http://www.fortiguard.com/advisory/Potential-Man-In-The-Middle-Vulnerability-in-FortiClient-VPN/
• http://www.securityfocus.com/bid/59604

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