What is CVE-2021-24033?

CVE-2021-24033 is a medium-severity vulnerability in Facebook React-Dev-Utils, classified under OS Command Injection. CVSS score: 5.6/10. Published 2021-03-09.

How severe is CVE-2021-24033?

Medium severity. CVSS v3 base score is 5.6 out of 10.

RCE in Facebook React-Dev-Utils

CVE-2021-24033

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.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.033 (87.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Facebook React-dev-utils — versions 11.0.4, unspecified

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

cve-assign@fb.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC)
cve-assign@fb.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-24033?: CVE-2021-24033 is a medium-severity vulnerability in Facebook React-Dev-Utils, classified under OS Command Injection. CVSS score: 5.6/10. Published 2021-03-09.
How severe is CVE-2021-24033?: Medium severity. CVSS v3 base score is 5.6 out of 10.