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.
Bulletin ID: AWS-2025-030 Scope: AWS Content Type: Important (requires attention) Publication Date: 2025/12/03 20:00 PM PST Description: AWS is aware of the recently disclosed CVE-2025-55182 which affects the React Server Flight protocol in React versions 19.0, 19.1, and 19.2, as well as in Next.js versions 15.x, 16.x, Next.js 14.3.0-canary.77 and later canary releases when using App Router. This issue may permit unauthorized remote code execution on affected applications servers. AWS is aware of CVE-2025-66478, which has been rejected as a duplicate of CVE-2025-55182. Customers using managed AWS services are not affected, and no action is required. Customers running an affected version of React or Next.js in their own environments should update to the latest patched versions immediately: - Customers using React 19.x, with Server Functions and RSC Components should update to the latest patched versions 19.0.1, 19.1.2, and 19.2.1 - Customers using Next.js 15-16 with App Router should update to a patched version
CSIRTS triage
- What
- An issue may permit unauthorized remote code execution on affected application servers.
- Who is affected
- Customers running affected versions of React or Next.js in their own environments.
- Urgency
- Remediation is urgent due to the potential for exploitation.
- Action
- Update to the latest patched versions immediately.
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 100% 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)