THREATPORT/VULNERABILITY/CVE-2021-24033
MEDIUM SEVERITY

CVE-2021-24033

React Dev Utils vulnerability

CVSS
5.6
EPSS
3.3%
EPSS pct
87th
Exploited
No known
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 vendor
Facebook
Affected product
React Dev Utils
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness type (CWE)
  • CWE-78 — OS Command Injection
Published
2021-03-09

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity, low impact to availability.

Its EPSS score of 3.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2021-24033

  • Confirm whether Facebook React Dev Utils is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-24033.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-24033

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-24033 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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