CVE-2021-30504

Name: CVE-2021-30504
Creator: NVD / NIST
Published: 2021-05-11T12:15:07.747+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.31%

Last modified Jun 17, 2026

CVE-2021-30504 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In JetBrains IntelliJ IDEA before 2021.1, DoS was possible because of unbounded resource allocation.. EPSS estimates a 2.31% chance of exploitation in the next 30 days.

Description

In JetBrains IntelliJ IDEA before 2021.1, DoS was possible because of unbounded resource allocation.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.31%

81.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Jetbrains	Intellij Idea	< 2021.1

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-2021-30504?

In JetBrains IntelliJ IDEA before 2021.1, DoS was possible because of unbounded resource allocation.

How severe is CVE-2021-30504?

CVE-2021-30504 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.31% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30504?

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-2021-30504?

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

Scan your code now

Source: NVD / NIST