CVE-2021-37253

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-12-05 · updated 2026-06-17
Weakness: CWE-444

Description

M-Files Web before 20.10.9524.1 allows a denial of service via overlapping ranges (in HTTP requests with crafted Range or Request-Range headers). NOTE: this is disputed because the range behavior is the responsibility of the web server, not the responsibility of the individual web application

Affected products

M-Files Corporation M-Files Web: before 20.10.9524.1 — fixed in 20.10.9524.1

How to fix

Upgrade to a fixed version: M-Files Corporation M-Files Web 20.10.9524.1. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/165139/M-Files-Web-Denial-Of-Service.html
http://seclists.org/fulldisclosure/2021/Dec/1
https://vulmon.com/vulnerabilitydetails?qid=CVE-2021-37253
https://www.m-files.com/about/trust-center/security-advisories/cve-2021-37253-denial-of-service/
https://www.m-files.com/company/trust-center/vulnerability-disclosure/
https://www.tenable.com/cve/CVE-2021-37253
http://packetstormsecurity.com/files/165139/M-Files-Web-Denial-Of-Service.html
http://seclists.org/fulldisclosure/2021/Dec/1
https://vulmon.com/vulnerabilitydetails?qid=CVE-2021-37253
https://www.m-files.com/about/trust-center/security-advisories/cve-2021-37253-denial-of-service/
https://www.m-files.com/company/trust-center/vulnerability-disclosure/
https://www.tenable.com/cve/CVE-2021-37253

Get alerted when CVE-2021-37253 or the next vulnerability affects your stack