What is CVE-2021-25758?

CVE-2021-25758 is a high-severity vulnerability in Jetbrains Intellij Idea, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2021-02-03.

How severe is CVE-2021-25758?

High severity. CVSS v3 base score is 7.8 out of 10.

Deserialization in Jetbrains Intellij Idea

CVE-2021-25758

In JetBrains IntelliJ IDEA before 2020.3, potentially insecure deserialization of the workspace model could lead to local code execution.

Vulnerability class: Insecure Deserialization

Published 2021-02-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Jetbrains Intellij Idea

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

blog.jetbrains.com (Product)
blog.jetbrains.com/blog/2021/02/03/jetbrains-security-bulletin-q4-2020/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-25758?: CVE-2021-25758 is a high-severity vulnerability in Jetbrains Intellij Idea, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2021-02-03.
How severe is CVE-2021-25758?: High severity. CVSS v3 base score is 7.8 out of 10.