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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.

Kimai是Kimai团队开源的一款项目管理系统。 Kimai 2.53.0之前版本存在输入验证错误漏洞，该漏洞源于SAML身份验证成功处理器接受未验证的RelayState POST参数作为重定向目标，可能导致具有IdP访问权限的攻击者通过恶意RelayState值将已认证用户重定向到攻击者控制的URL，造成凭据窃取或钓鱼攻击。

CVSS 4.7 · Medium EPSS 0.36% · P28

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:L/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
Vulnerability Title
Kimai 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kimai是Kimai团队开源的一款项目管理系统。 Kimai 2.53.0之前版本存在输入验证错误漏洞，该漏洞源于SAML身份验证成功处理器接受未验证的RelayState POST参数作为重定向目标，可能导致具有IdP访问权限的攻击者通过恶意RelayState值将已认证用户重定向到攻击者控制的URL，造成凭据窃取或钓鱼攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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