CVE-2021-37253

Name: CVE-2021-37253
Creator: NVD / NIST
Published: 2021-12-05T21:15:07.753+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.84%

Last modified Jun 17, 2026

CVE-2021-37253 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 2.84% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.84%

84.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
M-Files	M-Files Web	< 20.10.9524.1

References

http://packetstormsecurity.com/files/165139/M-Files-Web-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Dec/1Exploit, Mailing List, Third Party Advisory
https://vulmon.com/vulnerabilitydetails?qid=CVE-2021-37253Exploit, Third Party Advisory
https://www.m-files.com/about/trust-center/security-advisories/cve-2021-37253-denial-of-service/Vendor Advisory
https://www.m-files.com/company/trust-center/vulnerability-disclosure/Vendor Advisory
https://www.tenable.com/cve/CVE-2021-37253Exploit, Third Party Advisory
http://packetstormsecurity.com/files/165139/M-Files-Web-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Dec/1Exploit, Mailing List, Third Party Advisory
https://vulmon.com/vulnerabilitydetails?qid=CVE-2021-37253Exploit, Third Party Advisory
https://www.m-files.com/about/trust-center/security-advisories/cve-2021-37253-denial-of-service/Vendor Advisory
https://www.m-files.com/company/trust-center/vulnerability-disclosure/Vendor Advisory
https://www.tenable.com/cve/CVE-2021-37253Exploit, Third Party Advisory

Timeline

Published: Dec 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37253?

How severe is CVE-2021-37253?

CVE-2021-37253 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.84% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37253?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-37253?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST