No exploitation reportedFix available

CVE-2021-41807

Q: Is CVE-2021-41807 actively exploited?

Active exploitation of CVE-2021-41807 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-41807?

CVE-2021-41807 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2022-01-18
Fixed in21.12.10873.0
WeaknessCWE-307

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Lack of rate limiting in M-Files Server and M-Files Web products with versions before 21.12.10873.0 in certain type of user accounts allows unlimited amount of attempts and therefore makes brute-forcing login accounts easier.

Timeline

dates in UTC

2022-01-1817:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-41807?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-41807?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

M-files m-files server

Branch	Affected	Fixed in	Source
21.12	< 21.12.10873.0	21.12.10873.0	NVD

M-files m-files web

Branch	Affected	Fixed in	Source
21.12	< 21.12.10873.0	21.12.10873.0	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update M-files m-files server to 21.12.10873.0

Advisories and patches

www.m-files.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.17.5read 2026-10-23
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-307read 2026-10-23
NVDweakness (CWE)CWE-307read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2022-01-18
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-41807?

Is CVE-2021-41807 actively exploited?

Active exploitation of CVE-2021-41807 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-41807?

CVE-2021-41807 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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