What is CVE-2021-41809?

CVE-2021-41809 is a low-severity vulnerability in M-Files Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.5/10. Published 2022-01-18.

How severe is CVE-2021-41809?

Low severity. CVSS v3 base score is 3.5 out of 10.

SSRF in M-Files Server

CVE-2021-41809

SSRF vulnerability in M-Files Server products with versions before 22.1.11017.1, in a preview function allowed making queries from the server with certain document types referencing external entities.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2022-01-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

M-Files Server — versions Online
M-Files Server

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

www.m-files.com/about/trust-center/security-vulnerabilities/cve-2021-41809/ (Vendor Advisory)
empower.m-files.com/security-advisories/CVE-2021-41809 (vendor-advisory)

Frequently asked questions

What is CVE-2021-41809?: CVE-2021-41809 is a low-severity vulnerability in M-Files Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.5/10. Published 2022-01-18.
How severe is CVE-2021-41809?: Low severity. CVSS v3 base score is 3.5 out of 10.