Open redirect in kimai2 - #VU125948
Published: April 14, 2026
Vulnerability identifier: #VU125948
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Kevin Papst
Affected software:
kimai2
kimai2
Detailed vulnerability description
The vulnerability allows a remote attacker to redirect users to an attacker-controlled site.
The vulnerability exists due to url redirection to an untrusted site in src/Saml/Security/SamlAuthenticationSuccessHandler.php when processing the RelayState parameter in the SAML ACS handler. A remote attacker can supply a malicious RelayState value to redirect users to an attacker-controlled site.
SAML must be enabled, and exploitation is limited to IdP-initiated SSO flows where a malicious RelayState value is included. User interaction is required to complete SAML authentication.
Remediation
Install security update from vendor's website.