CVE-2021-41809: SSRF vulnerability in M-Files Server products with versions before 22.1.11017.1, allows requests from server.

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-18 · updated 2026-06-17
Weakness: CWE-918

Description

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.

Affected products

M-Files Corporation M-Files Server: before 22.1.11017.1 — fixed in 22.1.11017.1

How to fix

Upgrade to a fixed version: M-Files Corporation M-Files Server 22.1.11017.1. Check the vendor advisory for mitigations.

References

https://empower.m-files.com/security-advisories/CVE-2021-41809
https://www.m-files.com/about/trust-center/security-vulnerabilities/cve-2021-41809/
https://www.m-files.com/about/trust-center/security-vulnerabilities/cve-2021-41809/

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