CVE-2023-5654
CVE-2023-5654 is a medium-severity vulnerability in Facebook React-devtools with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- EPSS exploit prediction: 0% (37th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-285
- Affected product: Facebook React-devtools
- Published:
- Last modified:
Description
The React Developer Tools extension registers a message listener with window.addEventListener('message', <listener>) in a content script that is accessible to any webpage that is active in the browser. Within the listener is code that requests a URL derived from the received message via fetch(). The URL is not validated or sanitised before it is fetched, thus allowing a malicious web page to arbitrarily fetch URL’s via the victim's browser.
Frequently asked questions
- What is CVE-2023-5654?
- The React Developer Tools extension registers a message listener with window.addEventListener('message', <listener>) in a content script that is accessible to any webpage that is active in the browser. Within the listener is code that requests a URL derived from the received message via fetch(). The URL is not validated or sanitised before it is fetched, thus allowing a malicious web page to arbitrarily fetch URL’s via the victim's browser.
- How severe is CVE-2023-5654?
- CVE-2023-5654 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
- Is CVE-2023-5654 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-5654?
- CVE-2023-5654 affects Facebook React-devtools. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-5654?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2023-5654 published?
- CVE-2023-5654 was published on 2023-10-19 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:facebook:react-devtools:*:*:*:*:*:*:*:*
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