CVE-2023-6912 — Lack of protection against brute force attacks in M-Files Server before 23

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
M-Files Corporation	M	Files Server — 0, 23.2 LTS SR6, 23.8 LTS SR4

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-12-20T09:35:46.232Z
• Last modified: 2026-02-23T10:07:53.064Z

09References

• product.m-files.com — https://product.m-files.com/security-advisories/cve-2023-6912/
• empower.m-files.com — https://empower.m-files.com/security-advisories/CVE-2023-6912