Authentication Bypass in Mendix SAML from Mendix
CVE-2025-40758

8.7HIGH

Key Information:

Vendor

Siemens
Status
Mendix Saml (mendix 10.12 Compatible)
Mendix Saml (mendix 10.21 Compatible)
Mendix Saml (mendix 9.24 Compatible)
Vendor
CVE Published:
14 August 2025

What is CVE-2025-40758?

A security flaw has been detected in the Mendix SAML module, specifically in versions compatible with Mendix 10.12, 10.21, and 9.24. This vulnerability arises from inadequate enforcement of signature validation and binding checks, which may enable unauthenticated remote attackers to hijack user accounts, particularly in certain single sign-on (SSO) implementations. Organizations using affected versions are encouraged to update their software to mitigate potential risks.

Affected Version(s)

Mendix SAML (Mendix 10.12 compatible) 0

Mendix SAML (Mendix 10.21 compatible) 0

Mendix SAML (Mendix 9.24 compatible) 0

References

https://cert-portal.siemens.com/productcert/html/ssa-3954...

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-40758 : Authentication Bypass in Mendix SAML from Mendix