CVE-2021-40875

Name: CVE-2021-40875
Creator: NVD / NIST
Published: 2021-09-22T15:15:09.677+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 48.42%

Last modified Jun 17, 2026

CVE-2021-40875 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Improper Access Control in Gurock TestRail versions < 7.2.0.3014 resulted in sensitive information exposure. A threat actor can access the /files.md5 file on the client side of a Gurock TestRail application, disclosing a full list of application files and the corresponding file paths. EPSS estimates a 48.42% chance of exploitation in the next 30 days.

Description

Improper Access Control in Gurock TestRail versions < 7.2.0.3014 resulted in sensitive information exposure. A threat actor can access the /files.md5 file on the client side of a Gurock TestRail application, disclosing a full list of application files and the corresponding file paths. The corresponding file paths can be tested, and in some cases, result in the disclosure of hardcoded credentials, API keys, or other sensitive data.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

48.42%

98.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-425

Affected Software

Vendor	Product	Versions
Gurock	Testrail	< 7.2.0.3014

References

http://packetstormsecurity.com/files/164270/Gurock-Testrail-7.2.0.3014-Improper-Access-Control.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/SakuraSamuraii/derailedThird Party Advisory
https://johnjhacking.com/blog/cve-2021-40875/Exploit, Third Party Advisory
https://www.gurock.com/testrail/tour/enterprise-editionProduct, Vendor Advisory
http://packetstormsecurity.com/files/164270/Gurock-Testrail-7.2.0.3014-Improper-Access-Control.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/SakuraSamuraii/derailedThird Party Advisory
https://johnjhacking.com/blog/cve-2021-40875/Exploit, Third Party Advisory
https://www.gurock.com/testrail/tour/enterprise-editionProduct, Vendor Advisory

Timeline

Published: Sep 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40875?

How severe is CVE-2021-40875?

CVE-2021-40875 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 48.42% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40875?

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-2021-40875?

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

Scan your code now

Source: NVD / NIST