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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Kimai
  • Kimai

No data.

No data.

References
Link Providers
https://github.com/kimai/kimai/security/advisories/GHSA-3jp4-mhh4-gcgr cve-icon cve-icon
https://www.vulncheck.com/advisories/kimai-before-2.53.0-open-redirect-via-relaystate cve-icon cve-icon
History

Fri, 28 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 0, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N'}

cvssV4_0

{'score': 0, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N'}

 cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N'}

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 25 Aug 2026 23:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Kimai before 2.53.0 Open Redirect via RelayState
First Time appeared Kimai
Kimai kimai
Weaknesses CWE-601
CPEs cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:*
Vendors & Products Kimai
Kimai kimai
References
Metrics cvssV3_1

{'score': 0, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N'}

cvssV4_0

{'score': 0, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-08-25T23:19:05.809Z

Updated: 2026-08-28T15:18:32.829Z

Reserved: 2026-08-25T23:14:37.730Z

Link: CVE-2026-80200

cve-icon Vulnrichment

Updated: 2026-08-26T15:58:55.833Z

cve-icon NVD

Status : Deferred

Published: 2026-08-26T05:18:27.680

Modified: 2026-08-31T20:52:56.343

Link: CVE-2026-80200

cve-icon Redhat

No data.