TI-2026-30186 Aliases CVE-2026-41669 GHSA-25cw-98hg-g3cg

Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed

HIGH 75CWE-347Published 2026-05-07 · Updated 2026-05-07

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: Low · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-347.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00191 8th percentileScored 2026-11-07

Fix Fixed admidio (Admidio): 5.0.9admidio/admidio (Packagist): 5.0.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Admidio	admidio	before 5.0.9	5.0.9	Patch available	CNA
—	admidio/admidio (Packagist)	before 5.0.9	5.0.9	Patch available	GHSA-25cw-98hg-g3cg

admidio VendorAdmidio Affected before 5.0.9 Fixed in 5.0.9 Patch available CNA
admidio/admidio (Packagist) Vendor— Affected before 5.0.9 Fixed in 5.0.9 Patch available GHSA-25cw-98hg-g3cg

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:admidio:admidio::::::::	—	—	Admidio

cpe:2.3:a:admidio:admidio:*:*:*:*:*:*:*:* Versions — — ·Admidio

Remediation

Fix · CNA admidio (Admidio) Fixed in 5.0.9
Fix · GHSA-25cw-98hg-g3cg admidio/admidio (Packagist) Fixed in 5.0.9 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-41669
2026-10-03 Alias added: GHSA-25cw-98hg-g3cg

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-41669

Other 3

TI-2026-25286 Admidio is Missing Authorization and CSRF Protection on Document and Folder Deletion CVSS 3.1CRITICAL 9.1
TI-2026-56995 Admidio before 5.0.12 Authentication Bypass via RSS feeds CVSS 4.0HIGH 8.7
TI-2026-56993 Admidio before 5.0.12 SQL Injection via relation_type_list CVSS 4.0HIGH 8.7
TI-2024-25222 Admidio has Blind SQL Injection in ecard_send.php CVSS 3.1CRITICAL 10.0
TI-2024-25764 Admidio Vulnerable to RCE via Arbitrary File Upload in Message Attachment CVSS 3.1CRITICAL 9.1
TI-2026-25247 Admidio: Unrestricted File Upload via CSRF Token Validation Bypass in Documents & Files Module CVSS 3.1HIGH 8.8

See all 72 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences