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High · 7.5 Public exploit CVE-2025-43864 EUVD-2025-11980GHSA-f46r-rw29-r322

React Router allows a DoS via cache poisoning by forcing SPA 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. Starting in version 7.2.0 and prior to version 7.5.2, it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the page. If a cache system is in place, this allows the response containing the error to be cached, resulting in a cache poisoning that strongly impacts the availability of the application. This issue has been patched in version 7.5.2.

Affected products

VendorProductAffectedFixed
remix-run react-router >= 7.2.0, < 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 >= 7.2.0, < 7.5.2 7.5.2 GHSA-f46r-rw29-r322

Advisories 1

References