CVE detail
CVE-2025-55182: Meta React Server Components Remote Code Execution Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
Meta · React Server Components
- Date added (KEV)
- Dec 05, 2025
- CISA due date
- Dec 12, 2025
- Ransomware campaign use
- Known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Scorifya interpretation
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Plain English
Technical detail
From CISA
Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints. Please note CVE-2025-66478 has been rejected, but it is associated with CVE-2025- 55182.
Check for signs of potential compromise on all internet accessible REACT instances after applying mitigations. For more information, please see: https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components ; https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file ; https://nvd.nist.gov/vuln/detail/CVE-2025-55182
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now, including in ransomware campaigns. Scorifya can't test for Meta directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
SOC 2 compliance
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See Scorifya Controls →References
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-componentsPatchVendor Advisory
- https://www.facebook.com/security/advisories/cve-2025-55182Vendor Advisory
- http://www.openwall.com/lists/oss-security/2025/12/03/4Mailing ListPatchThird Party Advisory
- https://news.ycombinator.com/item?id=46136026Issue Tracking
- https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/