CVE-2025-55182 React Server Components Remote Code Execution...

[carlospolop]

🤖 Automated Content Update

This PR was automatically generated by the HackTricks News Bot based on a technical blog post.

📝 Source Information

• Blog URL: https://github.com/Spritualkb/CVE-2025-55182-exp
• Blog Title: CVE-2025-55182 React Server Components Remote Code Execution Exploit Tool
• Suggested Section: Pentesting Web -> NextJS (or, alternatively, Pentesting Web -> NodeJS Express / Prototype Pollution & Deserialization) with a subsection on "React Server Components Flight protocol deserialization RCE (CVE-2025-55182)"

🎯 Content Summary

Title: CVE-2025-55182 React Server Components Remote Code Execution Exploit Tool

This repository contains a Python-based exploit framework for CVE-2025-55182, a critical Remote Code Execution (RCE) vulnerability in React Server Components (RSC) affecting Next.js App Router deployments that use Server Actions and react-server-dom-webpack versions 19.0.0–19.2.0 (Next.js 15.x an...

🔧 Technical Details

Prototype pollution via RSC Flight protocol references
The technique relies on RSC’s Flight protocol treating strings starting with $ as object-reference paths. By assigning "then": "$1:__proto__:then" in a Flight payload, the deserializer writes a then property into Object.prototype through __proto__. This prototype pollution converts many otherwise benign objects into thenables, altering how asynchronous or promise-based framework code handles them and enabling attacker-controlled code paths.

Escalating a polluted reference into the Function constructor
The exploit generalizes a common prototype-chain trick: object.constructor usually yields Object, and Object.constructor is the global Function constructor. By placing a value like "$1:constructor:constructor" in a deserialized structure (e.g., assi...

🤖 Agent Actions

Summary:

• Expanded src/network-services-pentesting/pentesting-web/nextjs.md with a new section covering CVE-2025-55182 React Server Components Flight protocol deserialization RCE, including the prototype-pollution-to-Function attack chain, payload structure, exploitation workflow, OPSEC options, and hardening guidance.
• Added an internal reference to the NodeJS prototype pollution page plus an external reference to the exploit repository in the References section.

Testing:

• Not required for documentation updates.

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This PR was automatically created by the HackTricks Feed Bot. Please review the changes carefully before merging.

[carlospolop]

🔗 Additional Context

Original Blog Post: https://github.com/Spritualkb/CVE-2025-55182-exp

Content Categories: Based on the analysis, this content was categorized under "Pentesting Web -> NextJS (or, alternatively, Pentesting Web -> NodeJS Express / Prototype Pollution & Deserialization) with a subsection on "React Server Components Flight protocol deserialization RCE (CVE-2025-55182)"".

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