ICSA-25-135-15: Siemens Mendix OIDC SSO
CISA advisory · released 2025-05-13
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 6, 2026-04-16 (final)
CISA's summary
Summary: 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. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | Mendix OIDC SSO (Mendix 10.12 compatible) | vers:intdot/<4.0.1 |
| Siemens | Mendix OIDC SSO (Mendix 9 compatible) | vers:intdot/<3.3.1 |
| Siemens | Mendix OIDC SSO V4.2 (Mendix 10 compatible) | vers:intdot/<4.2.1 |
| Siemens | Mendix OIDC SSO V4.3 (Mendix 10 compatible) | vers:all/* |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2025-40571 — CVE-2025-40571 · CWE-266
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.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reported this vulnerability to CISA.
The advisory's legal notice
The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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