CVE-2026-80200

Kimai before 2.53.0 Open Redirect via RelayState

MEDIUM
4.7
CVSS Score
Published: August 25, 2026 at 11:19 PM UTC
Updated: October 8, 2026 at 04:17 PM UTC
1 product affected across 1 vendorKimai

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Severity
MEDIUM4.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0 ≤ v < 2.53.00
Vendor states this is fixed in 2.53.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.7MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-601

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