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
https://www.m-files.com/company/trust-center/vulnerability-disclosure/
https://www.m-files.com/about/trust-center/security-advisories/cve-2021-37253-denial-of-service/