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TI-2026-30187 Aliases CVE-2026-41670GHSA-p9w9-87c8-m235

Admidio: SAML Response Sent to Unvalidated Assertion Consumer Service URL from AuthnRequest

Priority HIGH 69CWE-20Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

Admidio is an open-source user management solution. Prior to version 5.0.9, the SAML IdP implementation in Admidio's SSO module uses the AssertionConsumerServiceURL value directly from incoming SAML AuthnRequest messages as the destination for the SAML response, without validating it against the registered ACS URL (smc_acs_url) stored in the database for the corresponding service provider client. An attacker who knows the Entity ID of a registered SP client can craft a SAML AuthnRequest with an arbitrary AssertionConsumerServiceURL, causing the IdP to send the signed SAML response -- containing user identity attributes (login name, email, roles, profile fields) -- to an attacker-controlled URL. 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 0.0028 20th 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
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Admidioadmidiobefore 5.0.95.0.9Patch availableCNA
—admidio/admidio (Packagist)before 5.0.95.0.9Patch availableGHSA-p9w9-87c8-m235
  • 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-p9w9-87c8-m235

CPE names Threatist (inferred) · 1

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

CPEVersionsRoleVendor
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-p9w9-87c8-m235 admidio/admidio (Packagist) Fixed in 5.0.9 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41670
  2. 2026-10-03 Alias added: GHSA-p9w9-87c8-m235

References

Advisory 1

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-2026-30186 Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed CVSS 3.1HIGH 8.2
  • TI-2024-25764 Admidio Vulnerable to RCE via Arbitrary File Upload in Message Attachment CVSS 3.1CRITICAL 9.1
See all 72 →

Sources

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