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CVE-2026-41662— Admidio: Missing Minimum Administrator Check in Role Membership Removal

CVSS 5.2 · Medium EPSS 0.03% · P9
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I. Basic Information for CVE-2026-41662

Vulnerability Information
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Vulnerability Title
Admidio: Missing Minimum Administrator Check in Role Membership Removal
Source: NVD (National Vulnerability Database)
Vulnerability Description
Admidio is an open-source user management solution. Prior to version 5.0.9, Role::stopMembership() does not verify whether removing a user from the administrator role leaves zero administrators. The deprecated Membership::stopMembership() contains this safety check, but the current code path bypasses it. Any administrator can remove the last remaining other administrator, locking the entire system out of administrative access. The exploit does not require concurrent requests; sequential removals produce the same result. This issue has been patched in version 5.0.9.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对因果或异常条件的不恰当检查
Source: NVD (National Vulnerability Database)
Vulnerability Title
Admidio 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Admidio是Admidio团队的一套开源的成员管理系统。该系统支持成员列表、事件管理、留言簿、相册和下载等功能。 Admidio 5.0.9之前版本存在代码问题漏洞，该漏洞源于Role::stopMembership未验证移除管理员角色后是否剩余管理员，允许任何管理员移除最后一名其他管理员，导致整个系统无法进行管理访问。
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

VendorProductAffected VersionsCPESubscribe
Admidioadmidio < 5.0.9 -

II. Public POCs for CVE-2026-41662

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III. Intelligence Information for CVE-2026-41662

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Same Patch Batch · Admidio · 2026-05-07 · 13 CVEs total

CVE-2026-416698.2 HIGHAdmidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequest
CVE-2026-416708.2 HIGHAdmidio: SAML Response Sent to Unvalidated Assertion Consumer Service URL from AuthnReques
CVE-2026-416607.1 HIGHAdmidio: Inverted 2FA Reset Authorization Check Lets Group Leaders Strip Admin TOTP
CVE-2026-416716.8 MEDIUMAdmidio: OIDC Token Introspection Endpoint Returns Active for All Tokens Without Validatio
CVE-2026-421946.8 MEDIUMIncomplete fix for CVE-2026-32812: SSRF in admidio
CVE-2026-416586.5 MEDIUMAdmidio: Missing Authorization on Inventory Module Destructive Endpoints Allows Any Authen
CVE-2026-416556.5 MEDIUMAdmidio: Path Traversal in ECard Preview Allows Reading Arbitrary Server Files Including D
CVE-2026-416616.1 MEDIUMAdmidio: Reflected XSS in msg_window.php via Square Bracket to HTML Tag Conversion
CVE-2026-416574.9 MEDIUMAdmidio: Cross-Organization Member Data Exposure via Permission Check Mismatch in contacts
CVE-2026-416564.5 MEDIUMAdmidio: Path Traversal via Unvalidated `name` Parameter in Document Add Mode Enables Arbi
CVE-2026-416633.5 LOWAdmidio: CSRF on Admin Preferences Triggers Unauthorized Backup, .htaccess Write, and Emai
CVE-2026-416592.7 LOWAdmidio: Hidden Profile Field Values Leaked via Blind Search Oracle in Member Assignment

IV. Related Vulnerabilities

Same product: admidio
Same vendor: Admidio
Same weakness: CWE-754

V. Comments for CVE-2026-41662

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