CVE-2021-37788

Name: CVE-2021-37788
Creator: NVD / NIST
Published: 2021-08-09T13:15:07.517+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.52%

Last modified Jun 17, 2026

CVE-2021-37788 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A vulnerability in the web UI of Gurock TestRail v5.3.0.3603 could allow an unauthenticated, remote attacker to affect the integrity of a device via a clickjacking attack. The vulnerability is due to insufficient input validation of iFrame data in HTTP requests that are sent to an affected device. EPSS estimates a 1.52% chance of exploitation in the next 30 days.

Description

A vulnerability in the web UI of Gurock TestRail v5.3.0.3603 could allow an unauthenticated, remote attacker to affect the integrity of a device via a clickjacking attack. The vulnerability is due to insufficient input validation of iFrame data in HTTP requests that are sent to an affected device. An attacker could exploit this vulnerability by sending crafted HTTP packets with malicious iFrame data. A successful exploit could allow the attacker to perform a clickjacking attack where the user is tricked into clicking a malicious link.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

1.52%

71.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1021

Affected Software

Vendor	Product	Versions
Gurock	Testrail	5.3.0.3603

References

https://gist.github.com/rvismit/67bc11dd9ccb7423827564cb81d25740Exploit, Third Party Advisory
https://gist.github.com/rvismit/67bc11dd9ccb7423827564cb81d25740Exploit, Third Party Advisory

Timeline

Published: Aug 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37788?

How severe is CVE-2021-37788?

CVE-2021-37788 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37788?

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-2021-37788?

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

Scan your code now

Source: NVD / NIST