CVE-2026-80200

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.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

CVSS 3.1

4.7CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-25)

CWE

CWE-601

Published

2026-08-26

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

References

• https://github.com/kimai/kimai/security/advisories/GHSA-3jp4-mhh4-gcgr
• https://www.vulncheck.com/advisories/kimai-before-2.53.0-open-redirect-via-relaystate

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