How severe is CVE-2021-40875?

CVE-2021-40875 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-40875 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 48% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40875?

CVE-2021-40875 affects Gurock Testrail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40875?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-40875 published?

CVE-2021-40875 was published on 2021-09-22 and last updated on 2026-06-17.

CVE-2021-40875

CVE-2021-40875 is a high-severity vulnerability in Gurock Testrail with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 48% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-425.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 48% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-425
Affected product: Gurock Testrail
Published: 2021-09-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-40875?: 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.
How severe is CVE-2021-40875?: CVE-2021-40875 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-40875 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 48% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40875?: CVE-2021-40875 affects Gurock Testrail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40875?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-40875 published?: CVE-2021-40875 was published on 2021-09-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gurock:testrail:*:*:*:*:*:*:*:*

More vulnerabilities in Gurock Testrail

CVE-2018-20063 — High (CVSS 8.8): An issue was discovered in Gurock TestRail 5.6.0.3853. An "Unrestricted Upload of File" vulnerability exists in the…
CVE-2021-36538 — Medium (CVSS 5.4): Cross Site Scripting (XSS) vulnerability in Gurock TestRail before 7.1.2 allows remote authenticated attackers to run…
CVE-2021-44263 — Medium (CVSS 5.4): Gurock TestRail before 7.2.4 mishandles HTML escaping.
CVE-2021-37788 — Medium (CVSS 5.4): A vulnerability in the web UI of Gurock TestRail v5.3.0.3603 could allow an unauthenticated, remote attacker to affect…
CVE-2019-7535 — Medium (CVSS 5.3): index.php in Gurock TestRail 5.3.0.3603 returns potentially sensitive information for an invalid request, as…
CVE-2014-4857 — Medium (CVSS 4.3): Cross-site scripting (XSS) vulnerability in Gurock TestRail before 3.1.3 allows remote attackers to inject arbitrary…

All CVEs affecting Gurock Testrail →

Other CWE-425 vulnerabilities

CVE-2025-26689 — Critical (CVSS 9.8): Direct request ('Forced Browsing') issue exists in CHOCO TEI WATCHER mini (IB-MCT001) all versions. If a remote…
CVE-2024-0204 — Critical (CVSS 9.8): Authentication bypass in Fortra's GoAnywhere MFT prior to 7.4.1 allows an unauthorized user to create an admin user via…
CVE-2022-45276 — Critical (CVSS 9.8): An issue in the /index/user/user_edit.html component of YJCMS v1.0.9 allows unauthenticated attackers to obtain the…
CVE-2022-26279 — Critical (CVSS 9.8): EyouCMS v1.5.5 was discovered to have no access control in the component /data/sqldata.
CVE-2021-36560 — Critical (CVSS 9.8): Phone Shop Sales Managements System using PHP with Source Code 1.0 is vulnerable to authentication bypass which leads…
CVE-2021-36745 — Critical (CVSS 9.8): A vulnerability in Trend Micro ServerProtect for Storage 6.0, ServerProtect for EMC Celerra 5.8, ServerProtect for…

Browse all CWE-425 vulnerabilities →