Description
A vulnerability has been identified in Mendix OIDC SSO (Mendix 10.12 compatible) (All versions < V4.0.1), Mendix OIDC SSO (Mendix 9 compatible) (All versions < V3.3.1), Mendix OIDC SSO V4.2 (Mendix 10 compatible) (All versions < V4.2.1), Mendix OIDC SSO V4.3 (Mendix 10 compatible) (All versions). The Mendix OIDC SSO module grants read and write access to all tokens exclusively to the Administrator role and could result in privilege misuse by an adversary modifying the module during Mendix development.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | Mendix OIDC SSO (Mendix 10.12 compatible) | < V4.0.1 | V4.0.1 |
| Siemens | Mendix OIDC SSO (Mendix 9 compatible) | < V3.3.1 | V3.3.1 |
| Siemens | Mendix OIDC SSO V4.2 (Mendix 10 compatible) | < V4.2.1 | V4.2.1 |
| Siemens | Mendix OIDC SSO V4.3 (Mendix 10 compatible) | — | — |
Advisories 2
- ICSA-25-135-15 Siemens Mendix OIDC SSO CISA ICS & IT advisories · Apr 16, 2026
- SSA-726617 SSA-726617: Incorrect Privilege Assignment Vulnerability in Mendix OIDC SSO Module Siemens ProductCERT · Apr 14, 2026