Critical React Server Components Vulnerability CVE-2025-55182: What Security Teams Need to Know
CVE-2025-55182 is a critical (CVSS 10.0) pre-authentication remote code execution vulnerability affecting React Server Components used in React.js, Next.js, and related frameworks (see the context section for a more exhaustive list of affected frameworks).
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Main Takeaways:
CVE-2025-55182 is a critical (CVSS 10.0) pre-authentication remote code execution vulnerability affecting React Server Components used in React.js, Next.js, and related frameworks (see the context section for a more exhaustive list of affected frameworks).
- Unauthenticated attackers can fully compromise servers with a single HTTP request.
- Next.js 15.0.5+, 15.1.9+, 15.2.6+, 15.3.6+, 15.4.8+, 15.5.7+, or 16.0.7+
- React 19.0.1+, 19.1.2+, or 19.2.1+
- If you can’t patch right away, disable Server Functions if possible, and deploy WAF rules.
- The risk is severe: data breaches, ransomware, compliance penalties, and business disruption are all possible.
- Organizations using React.js 19.x or Next.js 15.x/16.x should patch immediately. Upgrade to:
Start remidiation immediately, refer the knowledge-based article https://success.trendmicro.com/en-US/solution/KA-0021831.
Context: What is CVE-2025-55182?
The modern web runs on React. With over 40% of the top 10,000 websites leveraging this framework, React has become the backbone of enterprise applications, e-commerce platforms, and mission-critical business systems. On December 3rd, 2025, Facebook's security team disclosed CVE-2025-55182, a pre-authentication remote code execution vulnerability affecting React Server Components.
CVE-2025-55182 represents a flaw in how React Server Components handle data deserialization. The vulnerability exists in the core payload decoding mechanism that processes HTTP requests to endpoints running React Server Components. When React
translates incoming requests into server-side function calls, it deserializes payload data without adequate security controls, creating a direct pathway for attackers to execute arbitrary code.
What makes this vulnerability particularly dangerous is its accessibility. Attackers don't need credentials. They don't need to exploit complex chains of weaknesses. A single maliciously crafted HTTP POST request to any Server Function endpoint is sufficient to compromise the target server.
The affected packages include:
- react-server-dom-webpack versions 19.0.0 through 19.2.0
- react-server-dom-parcel versions 19.0.0 through 19.2.0
- react-server-dom-turbopack versions 19.0.0 through 19.2.0
Major frameworks built on React Server Components are also impacted, including Next.js (versions 15.x and 16.x), React Router with RSC APIs, Expo, Redwood SDK, Waku, and various Vite and Parcel plugins.
Potential Impact
Pre-authentication remote code execution vulnerabilities represent the crown jewels of attacker toolkits. CVE-2025-55182 grants adversaries capabilities that can lead to:
Infrastructure Compromise: Attackers gain remote access with server process privileges, enabling full filesystem access, credential harvesting, and installation of persistent access mechanisms.
Data Exfiltration: Customer databases, API keys, business logic, or intellectual property can be obtained following the infrastructure compromise.
Lateral Movement: Compromised React servers become pivot points for deeper network penetration, enabling attacks against internal systems, databases, and/or cloud resources.
Immediate Remediation Steps
If your organization runs affected versions, remediation should begin today:
Priority 1: Patch Immediately. Upgrade to:
- React 19.0.1+, 19.1.2+, or 19.2.1+
- Next.js 15.0.5+, 15.1.9+, 15.2.6+, 15.3.6+, 15.4.8+, 15.5.7+, or 16.0.7+
Priority 2: Implement Compensating Controls If immediate patching isn't feasible, consider:
- Deploying WAF rules to block suspicious serialization patterns
- Implementing strict network egress controls to prevent reverse shells
- Enabling comprehensive logging on all Server Function invocations
Priority 3: Defense in Depth Long-term security posture requires:
- Running Node.js processes with minimal privileges
- Container isolation with restricted capabilities
- Runtime application self-protection (RASP) solutions
- Regular vulnerability scanning and patching of JavaScript dependencies
What We're Seeing
Our Trend Research & Response team has been actively monitoring this vulnerability since disclosure. We've been analyzing telemetry, reviewing proof-of-concept exploits from the security community and developing detection signatures for enterprise environments.
We have observed active exploitation attempts in the wild. These attacks align with publicly available proof-of-concept code circulating in the security community. These attacks are with proof-of-concepts with dangerous configurations that are unrelated to React2Shell. Our threat response teams are activity engaged in hunting for any valid exploitation attempts exploiting CVE-2025-55182.
Organizations in financial services, technology, and e-commerce sectors appear to be receiving targeted reconnaissance and exploitation attempts.
How We Can Help
Our security team has been tracking CVE-2025-55182 since disclosure, developing detection signatures, analyzing proof-of-concept exploits, and building remediation guidance for enterprise environments.
We offer:
- Vulnerability Assessment: Rapid scanning to identify affected React deployments across your infrastructure
- Detection Engineering: Custom IDS/IPS rules tuned to your environment with minimal false positives
- Incident Response Readiness: Playbooks and procedures specifically addressing React Server Components compromises
- Remediation Support: Expert guidance on patching strategies that minimize business disruption
Contact our team today for a confidential assessment of your React infrastructure exposure.