CVE-2025-55182
Actively exploited. CVE-2025-55182 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-12-05) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2025-55182 is indexed in Metasploit, Exploit-DB, GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
On December 3, 2025, the React Team publicly disclosed a critical security vulnerability affecting React Server Components (RSC) and related packages. The vulnerability allows for unauthenticated remote code execution (RCE) via maliciously crafted HTTP requests. It is recommended to update all affected component packages and any frameworks that integrate them.
CSIRTS triage
- What
- A critical vulnerability allows unauthenticated remote code execution via malicious HTTP requests.
- Who is affected
- Users of React Server Components and related packages are affected.
- Urgency
- Remediation is critical due to active exploitation of the vulnerability.
- Action
- Update all affected component packages and frameworks.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99.9% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2025-55182 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
- Exploit-DBA public exploit is published in the Exploit-DB archive.look it up ↗
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
- NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗
Advisory coverage (4)
- unknownexploitedCVE-2025-66478: RCE in React Server Componentsaws · 2026-06-05
- criticalexploitedCVE-2025-55182: Meta React Server Components Remote Code Execution Vulnerabilitycisa-kev · 2025-12-05
- unknownexploited[Update] Vulnerability in React Server Components (December 5, 2025)cert-fr-alerte · 2025-12-05
- critical2025-041: Critical Security Vulnerability in React Server Componentscert-eu · 2025-12-04
External references
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[](https://www.csirts.com/cve/CVE-2025-55182)