Kimai before 2.53.0 Open Redirect via RelayState

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80200
StatePUBLISHED
AssignerVulnCheck
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-26 05:18:27 UTC
Updated2026-08-26 17:17:25 UTC
DescriptionKimai 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.

Risk And Classification

Primary CVSS: v4.0 0 NONE from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.003110000 probability, percentile 0.233470000 (date 2026-08-27)

Problem Types: CWE-601 | CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary0NONECVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS0NONECVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
3.1[email protected]Secondary0NONECVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N
3.1CNACVSS0NONECVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Confidentiality
None
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
None
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Kimai Kimai affected 2.53.0 semver Not specified
CNA Kimai Kimai unaffected 2.53.0 semver Not specified

References

ReferenceSourceLinkTags
www.vulncheck.com/advisories/kimai-before-2.53.0-open-redirect-via-relaystate [email protected] www.vulncheck.com
github.com/kimai/kimai/security/advisories/GHSA-3jp4-mhh4-gcgr [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: morimori-dev (en)

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