What’s Vulnerable › Vulnerabilities

CVE-2021-24033

• Severity: medium (CVSS 5.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-09 · updated 2026-06-17
• Weakness: CWE-78

Description

react-dev-utils prior to v11.0.4 exposes a function, getProcessForPort, where an input argument is concatenated into a command string to be executed. This function is typically used from react-scripts (in Create React App projects), where the usage is safe. Only when this function is manually invoked with user-provided values (ie: by custom code) is there the potential for command injection. If you're consuming it from react-scripts then this issue does not affect you.

Affected products

• Facebook react-dev-utils: before 11.0.4 — fixed in 11.0.4

How to fix

Upgrade to a fixed version: Facebook react-dev-utils 11.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/facebook/create-react-app/pull/10644
• https://www.facebook.com/security/advisories/cve-2021-24033
• https://github.com/facebook/create-react-app/pull/10644
• https://www.facebook.com/security/advisories/cve-2021-24033

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