# CVE-2023-25957: Auth bypass in Mendix SAML (Mendix 7 compatible)

> Unauthenticated attackers can bypass authentication and access the application due to insufficient verification of SAML assertions in the Mendix SAML module.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Mar 2023
- **Updated:** 27 Feb 2025
- **Also known as:** GHSA-q7cf-mx43-6qm5

## What is CVE-2023-25957?

CVE-2023-25957 is a critical authentication bypass vulnerability in Siemens Mendix SAML (Mendix 7 compatible), published on 14 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in Mendix SAML (Mendix 7 compatible) (All versions >= V1.16.4 < V1.17.3), Mendix SAML (Mendix 8 compatible) (All versions >= V2.2.0 < V2.3.0), Mendix SAML (Mendix 9 latest compatible, New Track) (All versions >= V3.1.9 < V3.3.1), Mendix SAML (Mendix 9 latest compatible, Upgrade Track) (All versions >= V3.1.8 < V3.3.0), Mendix SAML (Mendix 9.6 compatible, New Track) (All versions >= V3.1.9 < V3.2.7), Mendix SAML (Mendix 9.6 compatible, Upgrade Track) (All versions >= V3.1.8 < V3.2.6). The affected versions of the module insufficiently verify the SAML assertions. This could allow unauthenticated remote attackers to bypass authentication and get access to the application.

For compatibility reasons, fix versions still contain this issue, but only when the recommended, default configuration option `'Use Encryption'` is disabled.

Weakness: CWE-287 (Improper Authentication), CWE-303 (Incorrect Implementation of Authentication Algorithm)

## Which versions are affected by CVE-2023-25957?

It affects 1 product.


Products: Mendix Saml.

## How do I fix CVE-2023-25957?

No fix has been published for CVE-2023-25957 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-25957 being exploited?

There is no known exploitation of CVE-2023-25957 in the wild and no public exploit code.

## Other vulnerabilities in Siemens Mendix SAML (Mendix 7 compatible)

- [CVE-2022-44457](https://insights.sbomify.com/CVE-2022-44457/): Auth bypass in Mendix SAML (Mendix 7 compatible) (critical 9.8)
- [CVE-2022-37011](https://insights.sbomify.com/CVE-2022-37011/): Auth bypass in Mendix SAML (Mendix 7 compatible) (critical 9.8)
- [CVE-2022-46823](https://insights.sbomify.com/CVE-2022-46823/): Cross-site scripting in Mendix SAML (Mendix 8 compatible) (critical 9.3)
- [CVE-2023-29129](https://insights.sbomify.com/CVE-2023-29129/): Auth bypass in Mendix SAML (Mendix 7 compatible) (critical 9.1)
- [CVE-2021-33712](https://insights.sbomify.com/CVE-2021-33712/): Auth bypass in Mendix SAML Module (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-25957 and fix it if it is affected.

What it is: CVE-2023-25957 is a critical authentication bypass vulnerability in Siemens Mendix SAML (Mendix 7 compatible), published on 14 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-25957 in the wild and no public exploit code.

Affected product: Siemens Mendix SAML (Mendix 7 compatible). No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-25957/ (Markdown: https://insights.sbomify.com/CVE-2023-25957/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-25957
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-25957
- OSV: https://osv.dev/vulnerability/CVE-2023-25957

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-25957/
Summaries are generated and may contain mistakes; the official description above is the record.