CVE-2021-31909

Name: CVE-2021-31909
Creator: NVD / NIST
Published: 2021-05-11T12:15:08.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.21%

Last modified Jun 17, 2026

CVE-2021-31909 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In JetBrains TeamCity before 2020.2.3, argument injection leading to remote code execution was possible.. EPSS estimates a 3.21% chance of exploitation in the next 30 days.

Description

In JetBrains TeamCity before 2020.2.3, argument injection leading to remote code execution was possible.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

3.21%

86.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-88

Affected Software

Vendor	Product	Versions
Jetbrains	Teamcity	< 2020.2.3

References

https://blog.jetbrains.comVendor Advisory
https://blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/Vendor Advisory
https://blog.jetbrains.comVendor Advisory
https://blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/Vendor Advisory

Timeline

Published: May 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31909?

In JetBrains TeamCity before 2020.2.3, argument injection leading to remote code execution was possible.

How severe is CVE-2021-31909?

CVE-2021-31909 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.21% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31909?

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-2021-31909?

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

Scan your code now

Source: NVD / NIST