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OpenAdvisories
High · 8.2 Public exploit CVE-2025-43865 EUVD-2025-11979GHSA-cpj6-fhp6-mr6j

React Router allows pre-render data spoofing on React-Router framework mode

Published Apr 25, 2025 · Updated Apr 25, 2025 · Assigned by GitHub_M

Vendor: remix-run Product: react-router Package: react-router Ecosystem: npm

Description

React Router is a router for React. In versions on the 7.0 branch prior to version 7.5.2, it's possible to modify pre-rendered data by adding a header to the request. This allows to completely spoof its contents and modify all the values ​​of the data object passed to the HTML. This issue has been patched in version 7.5.2.

Affected products

VendorProductAffectedFixed
remix-run react-router >= 7.0, < 7.5.2 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
npm react-router >= 7.0.0-pre.0, < 7.5.2 7.5.2 GHSA-cpj6-fhp6-mr6j

Advisories 1

References