What is CVE-2025-42921?

CVE-2025-42921 is a medium-severity vulnerability in Jetbrains Toolbox App, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 4.2/10. Published 2025-04-17.

How severe is CVE-2025-42921?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Vulnerability in Jetbrains Toolbox App

CVE-2025-42921

In JetBrains Toolbox App before 2.6 host key verification was missing in SSH plugin

EPSS: 0.000 (0.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Jetbrains Toolbox App — versions 0

Weakness classification (CWE)

CWE-297 — Improper Validation of Certificate with Host Mismatch

References

www.jetbrains.com/privacy-security/issues-fixed/

Frequently asked questions

What is CVE-2025-42921?: CVE-2025-42921 is a medium-severity vulnerability in Jetbrains Toolbox App, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 4.2/10. Published 2025-04-17.
How severe is CVE-2025-42921?: Medium severity. CVSS v3 base score is 4.2 out of 10.