Back to Database
Status published
High
CVE-2025-43865
React Router allows pre-render data spoofing on React-Router framework mode
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-43865
Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/remix-run/react-router/security/advisories/GHSA-cpj6-fhp6-mr6j
- https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111
- https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/routes.ts#L87
More from remix-run
View All →CVE-2025-68470
React Router has unexpected external redirect via untrusted paths
Medium
6.5
CVE-2025-61686
React Router has Path Traversal in File Session Storage
Critical
9.1
CVE-2025-59057
React Router has XSS Vulnerability
High
7.6
CVE-2025-43864
React Router allows a DoS via cache poisoning by forcing SPA mode
High
7.5
CVE-2025-31137
Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers
High
7.5
Affected Vendor
remix-run
View all reports →Affected Software
react-router
Vulnerable Versions:
>= 7.0, < 7.5.2
Timeline
Official Publish:
April 25th, 2025
Last Modified:
April 25th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H