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CVE-2026-80200— Kimai before 2.53.0 Open Redirect via RelayState

Quick assessment

Affected
kimai kimai
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Kimai 版本低于 2.53.0 中，SAML 身份验证成功处理器存在一个开放重定向漏洞。该漏洞允许未经验证的 RelayState POST 参数被用作重定向目标。拥有 IdP（身份提供者）访问权限的攻擊者可以构造恶意的 RelayState 值，引导已通过认证的用户重定向到攻擊者控制的网站，从而实施凭据窃取或网络钓鱼攻击。

EPSS 0.31% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
kimai kimai < 2.53.0 affected
2.53.0 unaffected
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I. Basic Information for CVE-2026-80200

Vulnerability Information
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Vulnerability Title
Kimai before 2.53.0 Open Redirect via RelayState
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kimai kimai 0 ~ 2.53.0 -

II. Public POCs for CVE-2026-80200

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III. Intelligence Information for CVE-2026-80200

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Vendor Advisories for CVE-2026-80200 (2)

Same Patch Batch · kimai · 2026-08-25 · 10 CVEs total

CVE-2026-80193 8.8 HIGH Kimai before 2.62.0 Authorization Bypass via QuickEntry
CVE-2026-80202 8.8 HIGH Kimai before 2.56.0 Authorization Bypass via TimesheetVoter
CVE-2026-80196 7.5 HIGH Kimai before 2.58.0 Authentication Bypass via Password Reset Link
CVE-2026-80198 7.5 HIGH Kimai before 2.56.0 Information Disclosure via config() Twig Function
CVE-2026-80195 5.4 MEDIUM Kimai before 2.63.0 Team Membership Removal via API
CVE-2026-80194 4.3 MEDIUM Kimai before 2.64.0 Missing Authorization via ProjectViewController export
CVE-2026-80197 4.3 MEDIUM Kimai before 2.57.0 Improper Authorization via Favorite Endpoints
CVE-2026-80199 3.7 LOW Kimai before 2.54.0 Username Enumeration via Timing Oracle
CVE-2026-80201 2.0 LOW Kimai before 2.53.0 API Token Leakage via Invoice Template

IV. Related Vulnerabilities

Same product: kimai
Same vendor: kimai
Same weakness: CWE-601

V. Comments for CVE-2026-80200

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