CVE-2021-37253 json
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 hea…
published 2021-12-05 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-23825
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.9%
- EPSS 2.9% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- m-files m-files_web 20.10.9524.1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
2.93% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- seclists.org http://seclists.org/fulldisclosure/2021/Dec/1 referenced PoC, tagged "exploit" by a source, unverified
- packetstormsecurity.com http://packetstormsecurity.com/files/165139/M-Files-Web-Denial-Of-Service.html referenced PoC, tagged "exploit" by a source, unverified
- tenable.com https://www.tenable.com/cve/CVE-2021-37253 referenced PoC, tagged "exploit" by a source, unverified
- vulmon.com https://vulmon.com/vulnerabilitydetails?qid=CVE-2021-37253 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Classification
- Weakness
-
- CWE-444 Inconsistent Interpretation of HTTP Requests
References
-
seclists.org
/fulldisclosure/2021/Dec/1
mailing-list, exploit, third-party-advisory
-
packetstormsecurity.com
/files/165139/M-Files-Web-Denial-Of-Service.html
exploit, third-party-advisory, vdb-entry
-
tenable.com
/cve/CVE-2021-37253
exploit, third-party-advisory
-
vulmon.com
/vulnerabilitydetails?qid=CVE-2021-37253
exploit, third-party-advisory
-
m-files.com
/company/trust-center/vulnerability-disclosure/
vendor-advisory
-
m-files.com
/about/trust-center/security-advisories/cve-2021-37253-denial-of-service/
vendor-advisory
Sources
- CVE List CVE-2021-37253
- NVD CVE-2021-37253
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.