CVE-2025-55182: Critical React Vulnerability Hits Crypto Frontends

CVE-2025-55182: Critical React vulnerability hits crypto Frontends, and is already being used in crypto-drainer attacks against legitimate sites. The report describes an unauthenticated remote code execution vulnerability in how React decodes payloads sent to React Server Function endpoints. A patch is already available for the React 19.x branch, but Security Alliance is recording an increase in the number of drainer scripts being loaded onto legitimate (crypto) sites through exploitation of this CVE and is urging immediate inspection of front-end assets.

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What CVE-2025-55182 Is About

The issue affects applications that use React Server Components and React Server Functions in versions 19.0, 19.1.0, 19.1.1, and 19.2.0 via the react-server-dom family of packages (webpack, parcel, turbopack). The vulnerability allows a remote attacker, without authentication, to craft a special HTTP request to a Server Function endpoint; after deserializing such a request, React executes arbitrary code on the server. Even if an application does not declare its own Server Function endpoints, it can remain vulnerable if the build or the framework in use supports React Server Components. To remediate the issue, versions 19.0.1, 19.1.2, and 19.2.1 have been released, and related packages have been updated.

Thus, the impact extends not only to standalone projects but also to popular frameworks and toolchains that depend on the vulnerable packages. The advisory lists Next.js, React Router, Waku, @vitejs/plugin-rsc, Redwood SDK, and other solutions where React Server Functions are used as part of the infrastructure. For each of them, upgrade instructions have been published – from moving to the latest patch versions of Next.js 14.x–16.x to updating plugins and server packages in Vite, Redwood, and Waku projects. In parallel, the React Team has disclosed two additional vulnerabilities related to the same stack: CVE-2025-55184 (a high-severity Denial of Service) and CVE-2025-55183 (a medium-severity Source Code Exposure), as well as another case that has been closed with a separate patch.

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Risks for Crypto Platforms and Response Priorities

For crypto companies and Web3 projects, CVE-2025-55182 is rapidly moving into the realm of real-world incidents. Security Alliance notes a marked increase in drain campaign activity using the new vulnerability to load malicious scripts onto legitimate (crypto) sites, emphasizing the need for immediate inspection of front-end code and static assets. In an environment where crypto users interact with dApps and wallets through browser interfaces, a single successful RCE exploitation on the front-end server can lead to tampering with loaded JavaScript bundles, insertion of drainer widgets, and theft of funds from non-custodial wallets without compromising the blockchain or backend infrastructure.

Given the characteristics of the vulnerability, action prioritization aligns around three areas.

• First, immediately update the version of React in use and all frameworks that depend on React Server Components to the patch releases specified in the React Team's guidance. This includes moving to the latest versions of Next.js in the relevant branch, updating React Router and related plugins, and updating server packages in monorepo configurations.
• Second, review the front-end code supply chain: check repositories, CI/CD scripts, and build artifacts for unexpected dependencies, scripts, and configurations that have appeared since November 29, when the vulnerability was first disclosed.
• Third, analyze current deployments: compare bundle hashes, audit loaded static files, and manually inspect suspicious changes, especially those affecting integrations with Web3 wallets and crypto transactions.

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Conclusion

The story of CVE-2025-55182 demonstrates that critical attack points for the crypto industry extend beyond smart contracts and custody infrastructure, also encompassing seemingly standard front-end libraries. Companies that can quickly close such vulnerabilities while simultaneously maintaining strict control over the integrity of their front-end assets will be significantly better protected against scenarios where the compromise of a single UI stack component leads to a large-scale loss of user funds. Get more insights from our guides for beginners and professionals, and stay tuned for the latest updates and opportunities in the new economy, crypto industry, and blockchain developments!