Kimai up to 2.52.x SAML Authentication Success RelayState redirect

Summaryinfo

A vulnerability labeled as problematic has been found in Kimai up to 2.52.x. Affected is an unknown function of the component SAML Authentication Success Handler. Executing a manipulation of the argument RelayState can lead to redirect. This vulnerability is tracked as CVE-2026-80200. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Kimai up to 2.52.x and classified as problematic. This vulnerability affects an unknown part of the component SAML Authentication Success Handler. The manipulation of the argument RelayState with an unknown input leads to a redirect vulnerability. The CWE definition for the vulnerability is CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. As an impact it is known to affect integrity. CVE summarizes:

Kimai before 2.53.0 contains an open redirect vulnerability in the SAML authentication success handler that accepts unvalidated RelayState POST parameters as redirect destinations. Attackers with IdP access can supply malicious RelayState values to redirect authenticated users to attacker-controlled URLs for credential theft or phishing attacks.

The advisory is available at github.com. This vulnerability was named CVE-2026-80200 since 08/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project.

Upgrading to version 2.53.0 eliminates this vulnerability.

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Productinfo

Name

• Kimai

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.36
• 2.37
• 2.38
• 2.39
• 2.40
• 2.41
• 2.42
• 2.43
• 2.44
• 2.45
• 2.46
• 2.47
• 2.48
• 2.49
• 2.50
• 2.51
• 2.52

Website

• Product: https://github.com/kimai/kimai/

CPE 2.3info

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