CVE-2025-43865

HIGH

React Router 7.0.0-pre.0-7.5.1 - Insufficient Verification of Data Authenticity via Request Header

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-43865. PoCs published by pouriam23.

AI-analyzed exploit summary The repository appears to be a template for React Router applications with no exploit code or demonstration of CVE-2025-43865. It lacks any offensive techniques or vulnerability-specific details.

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.

Exploits (1)

nomisec STUB
by pouriam23 · poc
https://github.com/pouriam23/Pre-render-data-spoofing-on-React-Router-framework-mode-CVE-2025-43865

The repository appears to be a template for React Router applications with no exploit code or demonstration of CVE-2025-43865. It lacks any offensive techniques or vulnerability-specific details.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: React Router (version unspecified)
No auth needed
Prerequisites: None identified
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 8.2
EPSS 0.0063
EPSS Percentile 70.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-345
Status published
Products (2)
npm/react-router 7.0.0-pre.0 - 7.5.2npm
remix-run/react-router >= 7.0, < 7.5.2
Published Apr 25, 2025
Tracked Since Feb 18, 2026