What is CVE-2021-31899?

CVE-2021-31899 is a high-severity vulnerability in Jetbrains Code With Me. CVSS score: 8.8/10. Published 2021-05-11.

How severe is CVE-2021-31899?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Jetbrains Code With Me

CVE-2021-31899

In JetBrains Code With Me bundled to the compatible IDEs before version 2021.1, the client could execute code in read-only mode.

Published 2021-05-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (68.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Jetbrains Code With Me

References

blog.jetbrains.com (Vendor Advisory)
blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-31899?: CVE-2021-31899 is a high-severity vulnerability in Jetbrains Code With Me. CVSS score: 8.8/10. Published 2021-05-11.
How severe is CVE-2021-31899?: High severity. CVSS v3 base score is 8.8 out of 10.