What is CVE-2021-37540?

CVE-2021-37540 is a medium-severity vulnerability in Jetbrains Hub. CVSS score: 6.5/10. Published 2021-08-06.

How severe is CVE-2021-37540?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Jetbrains Hub

CVE-2021-37540

In JetBrains Hub before 2021.1.13262, a potentially insufficient CSP for the Widget deployment feature was used.

Published 2021-08-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Jetbrains Hub

References

blog.jetbrains.com/blog/2021/08/05/jetbrains-security-bulletin-q2-2021/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-37540?: CVE-2021-37540 is a medium-severity vulnerability in Jetbrains Hub. CVSS score: 6.5/10. Published 2021-08-06.
How severe is CVE-2021-37540?: Medium severity. CVSS v3 base score is 6.5 out of 10.