Mendix SAML vulnerabilities

The Mendix SAML module in multiple versions insufficiently verifies SAML assertions. This could allow unauthenticated remote attackers to bypass authentication and gain access to the application. The vulnerability affects specific module versions for Mendix 7, 8, and 9.

The affected versions of the Mendix SAML module insufficiently verify SAML assertions. An unauthenticated remote attacker could bypass authentication and gain access to the application. For compatibility reasons, fixed versions still contain this issue, but only when the recommended default configuration option 'Use Encryption' is disabled.

The Mendix SAML module (Mendix 9, 10, and 11 compatible versions before V3.6.29 and V4.2.4 respectively) does not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access by replaying a valid SAML response.

The Mendix SAML module in versions before V4.2.4 (for Mendix 10 and 11) and before V3.6.29 (for Mendix 9.24) does not properly validate the SAML response signature. In specific SSO configurations, this could allow unauthenticated remote attackers to hijack an account or session.