CVE-2025-43865
React Router HTTP Header Injection 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.
INFO
Published Date :
April 25, 2025, 1:15 a.m.
Last Modified :
April 29, 2025, 1:52 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-43865
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update React Router to version 7.5.2 or later.
- Validate that pre-rendered data cannot be modified via headers.
Public PoC/Exploit Available at Github
CVE-2025-43865 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-43865.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-43865 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-43865
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Dockerfile CSS TypeScript
None
HTML Python Shell
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-43865 vulnerability anywhere in the article.
-
Cyber Security News
React Router Vulnerabilities Let Attackers Spoof Contents & Modify Values
Significant security flaws have been discovered in React Router, a widely-used routing library for React applications, potentially allowing attackers to corrupt content, poison caches, and manipulate ... Read more
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Daily CyberSecurity
Critical Flaw Exposes Linux Security Blind Spot: io_uring Bypasses Detection
ARMO researchers have uncovered a critical weakness in Linux runtime security tools, revealing how the io_uring interface enables rootkits to operate undetected by conventional monitoring solutions. T ... Read more
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Daily CyberSecurity
React Router Vulnerabilities CVE-2025-43864 and CVE-2025-43865 Expose Web Applications to Attack
The React Router team has issued the advisory addressing two vulnerabilities affecting applications running in Framework mode: CVE-2025-43864 and CVE-2025-43865. Given React Router’s widespread usage ... Read more
The following table lists the changes that have been made to the
CVE-2025-43865 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Apr. 25, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H Added CWE CWE-345 Added Reference https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/routes.ts#L87 Added Reference https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111 Added Reference https://github.com/remix-run/react-router/security/advisories/GHSA-cpj6-fhp6-mr6j