CVE-2026-41669— Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed
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I. Basic Information for CVE-2026-41669
Vulnerability Information
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Vulnerability Title
Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed
Source: NVD (National Vulnerability Database)
Vulnerability Description
Admidio is an open-source user management solution. Prior to version 5.0.9, the Admidio SAML Identity Provider implementation discards the return value of its validateSignature() method at both call sites (handleSSORequest() line 418 and handleSLORequest() line 613). The method returns error strings on failure rather than throwing exceptions, but the developer believed it would throw (per comments on lines 416 and 611). This means the smc_require_auth_signed configuration option is completely ineffective — unsigned or invalidly-signed SAML AuthnRequests and LogoutRequests are processed identically to properly signed ones. 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:N/UI:N/S:U/C:L/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
密码学签名的验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Admidio 数据伪造问题漏洞
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之前版本存在数据伪造问题漏洞，该漏洞源于SAML身份提供者实现忽略了validateSignature方法的返回值，导致smc_require_auth_signed配置选项完全无效，未签名或签名无效的SAML请求被正常处理。
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
II. Public POCs for CVE-2026-41669
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- Release 5.0.9 · Admidio/admidio · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-41669
Same Patch Batch · Admidio · 2026-05-07 · 13 CVEs total
| CVE-2026-41670 | 8.2 HIGH | Admidio: SAML Response Sent to Unvalidated Assertion Consumer Service URL from AuthnReques |
| CVE-2026-41660 | 7.1 HIGH | Admidio: Inverted 2FA Reset Authorization Check Lets Group Leaders Strip Admin TOTP |
| CVE-2026-41671 | 6.8 MEDIUM | Admidio: OIDC Token Introspection Endpoint Returns Active for All Tokens Without Validatio |
| CVE-2026-42194 | 6.8 MEDIUM | Incomplete fix for CVE-2026-32812: SSRF in admidio |
| CVE-2026-41658 | 6.5 MEDIUM | Admidio: Missing Authorization on Inventory Module Destructive Endpoints Allows Any Authen |
| CVE-2026-41655 | 6.5 MEDIUM | Admidio: Path Traversal in ECard Preview Allows Reading Arbitrary Server Files Including D |
| CVE-2026-41661 | 6.1 MEDIUM | Admidio: Reflected XSS in msg_window.php via Square Bracket to HTML Tag Conversion |
| CVE-2026-41662 | 5.2 MEDIUM | Admidio: Missing Minimum Administrator Check in Role Membership Removal |
| CVE-2026-41657 | 4.9 MEDIUM | Admidio: Cross-Organization Member Data Exposure via Permission Check Mismatch in contacts |
| CVE-2026-41656 | 4.5 MEDIUM | Admidio: Path Traversal via Unvalidated `name` Parameter in Document Add Mode Enables Arbi |
| CVE-2026-41663 | 3.5 LOW | Admidio: CSRF on Admin Preferences Triggers Unauthorized Backup, .htaccess Write, and Emai |
| CVE-2026-41659 | 2.7 LOW | Admidio: Hidden Profile Field Values Leaked via Blind Search Oracle in Member Assignment |
IV. Related Vulnerabilities
Same product: admidio
- CVE-2026-42194
Incomplete fix for CVE-2026-32812: SSRF in admidio - CVE-2026-41671
Admidio: OIDC Token Introspection Endpoint Returns Active fo - CVE-2026-41670
Admidio: SAML Response Sent to Unvalidated Assertion Consume - CVE-2026-41663
Admidio: CSRF on Admin Preferences Triggers Unauthorized Bac - CVE-2026-41662
Admidio: Missing Minimum Administrator Check in Role Members
Same vendor: Admidio
- CVE-2026-42194
Incomplete fix for CVE-2026-32812: SSRF in admidio - CVE-2026-41671
Admidio: OIDC Token Introspection Endpoint Returns Active fo - CVE-2026-41670
Admidio: SAML Response Sent to Unvalidated Assertion Consume - CVE-2026-41663
Admidio: CSRF on Admin Preferences Triggers Unauthorized Bac - CVE-2026-41662
Admidio: Missing Minimum Administrator Check in Role Members
Same weakness: CWE-347
- CVE-2026-42193
Plunk: SNS webhook forgery - CVE-2026-44497
ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type - CVE-2026-7689
Dolibarr ERP CRM Online Signature security.lib.php dol_verif - CVE-2026-33467
Improper Verification of Cryptographic Signature in Elastic - CVE-2026-6986
Cesanta Mongoose GCM Authentication Tag tls_aes128.c mg_aes_
V. Comments for CVE-2026-41669
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