# CVE-2023-6912: Brute force vulnerability in M-Files user authentication

> Attackers can brute force M-Files Server user accounts due to missing rate limiting, potentially gaining unauthorized access to user data.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Dec 2023
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-6qxg-cm55-g85x

## What is CVE-2023-6912?

CVE-2023-6912 is a high-severity authentication bypass vulnerability in M-Files Server, published on 20 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Lack of protection against brute force attacks in M-Files Server before 23.12.13205.0 allows an attacker unlimited authentication attempts, potentially compromising targeted M-Files user accounts by guessing passwords.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2023-6912?

It affects 1 product.


Products: M-Files M-Files Server.

## How do I fix CVE-2023-6912?

No fix has been published for CVE-2023-6912 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6912 being exploited?

There is no known exploitation of CVE-2023-6912 in the wild and no public exploit code.

## Other vulnerabilities in M-Files Server

- [CVE-2024-10127](https://insights.sbomify.com/CVE-2024-10127/): Support for authentication bypass condition in M-Files LDAP authentication (critical 9.2)
- [CVE-2025-5964](https://insights.sbomify.com/CVE-2025-5964/): Path traversal in M-Files API (high 8.4)
- [CVE-2024-6789](https://insights.sbomify.com/CVE-2024-6789/): Path traversal in M-Files API (high 8.4)
- [CVE-2024-4056](https://insights.sbomify.com/CVE-2024-4056/): Denial of service condition in M-Files Server (high 7.5)
- [CVE-2023-3405](https://insights.sbomify.com/CVE-2023-3405/): Denial of service condition in M-Files Server (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6912 and fix it if it is affected.

What it is: CVE-2023-6912 is a high-severity authentication bypass vulnerability in M-Files Server, published on 20 Dec 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-2023-6912 in the wild and no public exploit code.

Affected product: M-Files Server. 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-2023-6912/ (Markdown: https://insights.sbomify.com/CVE-2023-6912/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6912
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6912
- OSV: https://osv.dev/vulnerability/CVE-2023-6912

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6912/
Summaries are generated and may contain mistakes; the official description above is the record.