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Vulnerability record · CVE-2021-31897 · published 11 May 2021

CVE-2021-31897: Jetbrains webstorm vulnerability

Jetbrains · Webstorm

In JetBrains WebStorm before 2021.1, code execution without user confirmation was possible for untrusted projects.

9.8 CVSS 3.1 Critical EPSS 1.5% · top 26.1%
9.8CVSS 3.1 base score, v2 7.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

In JetBrains WebStorm before 2021.1, code execution without user confirmation was possible for untrusted projects.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.jetbrains.com Vendor Advisory
https://blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/ Vendor Advisory
https://blog.jetbrains.com Vendor Advisory
https://blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-45977Jetbrains clion vulnerabilityJetBrains IntelliJ IDEA 2021.3.1 Preview, IntelliJ IDEA 2021.3.1 RC, PyCharm Professional 2021.3.1 RC, GoLand 2021.3.1, PhpStorm 2021.3.1 Preview, Ph…EPSS 1.1%8.4CVE-2026-64806Jetbrains webstorm inclusion from untrusted sphere vulnerabilityIn JetBrains WebStorm before 2026.2 arbitrary code execution was possible before granting project trust via the configured Node.js interpreterEPSS 0.19%8.4CVE-2026-64804Jetbrains webstorm inclusion from untrusted sphere vulnerabilityIn JetBrains WebStorm before 2026.2 arbitrary code execution was possible before granting project trust via project-local linter toolingEPSS 0.19%8.4CVE-2026-64805Jetbrains webstorm inclusion from untrusted sphere vulnerabilityIn JetBrains WebStorm before 2026.2 arbitrary code execution was possible before granting project trust via project-local package-manager toolingEPSS 0.19%7.8CVE-2026-64807Jetbrains webstorm inclusion from untrusted sphere vulnerabilityIn JetBrains WebStorm before 2026.2 arbitrary code execution was possible via a project-supplied linter configurationEPSS 0.19%7.8CVE-2024-52555Jetbrains webstorm vulnerabilityIn JetBrains WebStorm before 2024.3 code execution in Untrusted Project mode was possible via type definitions installer scriptEPSS 0.11%7.5CVE-2024-37051Jetbrains aqua insufficiently protected credentials vulnerabilityGitHub access token could be exposed to third-party sites in JetBrains IDEs after version 2023.1 and less than: IntelliJ IDEA 2023.1.7, 2023.2.7, 202…EPSS 3.8%7.5CVE-2021-31898Jetbrains webstorm cleartext transmission vulnerabilityIn JetBrains WebStorm before 2021.1, HTTP requests were used instead of HTTPS.EPSS 0.63%

Source: NIST National Vulnerability Database (record CVE-2021-31897), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.