Threats Tagged 'cve-2025-55182'

A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.

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CVE-2025-55182, also known as React2Shell, is a critical pre-authentication remote code execution vulnerability affecting React Server Components and related frameworks. With a CVSS score of 10.0, it allows attackers to execute arbitrary code on vulnerable servers through a single malicious HTTP request. Exploitation has been detected since December 5, 2025, primarily in red team assessments but also in real-world attacks delivering coin miners. The vulnerability stems from a failure to validate incoming payloads in React Server Components, enabling attackers to inject malicious structures leading to prototype pollution and remote code execution. Post-exploitation activities include running reverse shells, achieving persistence, evading security defenses, and attempting lateral movement to cloud resources.

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The critical Remote Code Execution vulnerability CVE-2025-55182, dubbed 'React2Shell', affects React Server Components (RSC) and extends beyond Next.js. Attackers are exploiting it for cloud-native initial access, credential harvesting, cryptomining, and deploying sophisticated backdoors. The vulnerability stems from improper input deserialization in RSC payloads, allowing arbitrary code execution. Exploitation has been observed across various cloud platforms, targeting containerized workloads. The exploit's mechanics involve crafting a malicious payload with self-referencing gadgets to bypass security checks during deserialization. Other frameworks using RSC, such as Waku and Vite, are also vulnerable. Urgent patching and comprehensive detection measures are crucial for affected systems.

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Within hours of the public disclosure of CVE-2025-55182 (React2Shell) on December 3, 2025, Amazon threat intelligence teams observed active exploitation attempts by multiple China state-nexus threat groups, including Earth Lamia and Jackpot Panda. This critical vulnerability in React Server Components has a maximum Common Vulnerability Scoring System (CVSS) score of 10.0 and affects React versions 19.x and Next.js versions 15.x and 16.x when using App Router.

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