CVE-2025-31137— Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers
Quick assessment
Affected
remix-run react-router
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
react-router是Remix开源的一个 React 的声明式路由。 react-router 7.0.0版本至7.4.0版本存在环境问题漏洞，该漏洞源于Remix或React Router的Express适配器允许通过URL路径名伪造请求URL。
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I. Basic Information for CVE-2025-31137
Vulnerability Information
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Vulnerability Title
Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers
Source: CVE Program / CVE List V5
Vulnerability Description
React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an incoming Request by putting a URL pathname in the port section of a URL that is part of a Host or X-Forwarded-Host header sent to a Remix/React Router request handler. This issue has been patched and released in Remix 2.16.3 and React Router 7.4.1.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
react-router 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
react-router是Remix开源的一个 React 的声明式路由。 react-router 7.0.0版本至7.4.0版本存在环境问题漏洞，该漏洞源于Remix或React Router的Express适配器允许通过URL路径名伪造请求URL。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| remix-run | react-router | >= 7.0.0, < 7.4.1 | - |
|
II. Public POCs for CVE-2025-31137
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | None | https://github.com/pouriam23/vulnerability-in-Remix-React-Router-CVE-2025-31137- | POC Details |
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IV. Related Vulnerabilities
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Same vendor: remix-run
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Same weakness: CWE-444
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V. Comments for CVE-2025-31137
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