## https://sploitus.com/exploit?id=2A3949D4-E15B-517B-9E8B-41874D2E9DF9
# CVE-2025-55182
Proof-of-Concept for CVE-2025-55182, a critical unauthenticated RCE in React Server Components.
> โ ๏ธ **Disclaimer**
> This document is provided strictly for **educational, defensive, and authorized security research purposes**.
> Do **NOT** attempt to exploit systems or applications without explicit written permission.
> The author assumes no responsibility for misuse of this information.
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## ๐ Overview
**CVE ID:** CVE-2025-55182
**Severity:** Critical
**Vulnerability Type:** Pre-Authentication Remote Code Execution (RCE)
**Root Cause:** Prototype Chain Pollution
**Affected Package:** `react-server-dom-webpack`
**Affected Version:** `19.0.0`
**Authentication Required:** No
CVE-2025-55182 is a **critical pre-authentication remote code execution vulnerability** affecting **React Server Components**.
The issue arises due to improper handling of user-controlled input, which allows **prototype chain pollution** and ultimately leads to **arbitrary code execution on the server**.
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## ๐ง Technical Details
- The vulnerability exists in the React Server Components implementation.
- User-supplied input is processed without adequate validation.
- Crafted input can pollute the JavaScript prototype chain.
- The polluted prototype is later accessed in a code execution context.
- This results in arbitrary server-side code execution.
- The attack can be performed remotely without authentication.
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## ๐ฏ Attack Vector
- **Attack Vector:** Network
- **Attack Complexity:** Low
- **Privileges Required:** None
- **User Interaction:** None
- **Scope:** Changed
An attacker can send a specially crafted request to a vulnerable React Server endpoint, triggering prototype pollution and achieving remote code execution.
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## ๐ฅ Impact
Successful exploitation of CVE-2025-55182 may allow an attacker to:
- Execute arbitrary system commands
- Compromise the application server
- Access sensitive environment variables
- Steal secrets or credentials
- Perform lateral movement within the infrastructure
- Fully take over the affected application
This vulnerability represents a **complete server compromise risk**.
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## ๐งช Proof of Concept (PoC)
A complete proof-of-concept demonstrates exploitation of CVE-2025-55182 in a controlled environment.
**High-level PoC description:**
- Send a crafted request containing malicious prototype keys
- Trigger prototype chain pollution in React Server processing
- Achieve execution of attacker-controlled code on the server
> โ ๏ธ The PoC is intended **only for local testing and lab environments**.
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## ๐ก Mitigation & Remediation
- **Upgrade immediately** once a patched version is released.
- Avoid using vulnerable versions of `react-server-dom-webpack`.
- Strictly validate and sanitize all user-controlled input.
- Prevent prototype pollution by:
- Disallowing `__proto__`, `constructor`, and `prototype` keys
- Using safe object creation patterns
- Implement runtime protections such as:
- Object freezing
- Deep input validation
- Security monitoring and logging
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## ๐ References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-55182
- React Security Advisories (when published)
- CWE-1321: Prototype Pollution
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## ๐ Responsible Disclosure
This document does not contain weaponized exploit code.
It is shared to raise awareness and help developers and security teams understand and remediate the issue responsibly.
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## ๐ License
MIT License