XSS Vulnerability in React Router and @remix-run/react Products from Remix-run
CVE-2025-59057

7.6HIGH

Key Information:

Vendor

Remix-run

Status
React-router
Vendor
CVE Published:
10 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-59057?

A Cross-Site Scripting (XSS) vulnerability was identified in the meta() and APIs of the React Router and @remix-run/react frameworks. This flaw, affecting specific versions, can allow attackers to execute arbitrary JavaScript during Server-Side Rendering (SSR) if untrusted content is processed for generating script:ld+json tags. Applications utilizing Declarative Mode or Data Mode are not impacted. The issue has been resolved in the latest versions, providing essential updates for developers to enhance security and maintain user safety.

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Deploy the Patch

Affected Version(s)

react-router @remix-run/react >= 1.15.0, < 2.17.1 < @remix-run/react 1.15.0, 2.17.1

react-router react-router >= 7.0.0, < 7.9.0 < react-router 7.0.0, 7.9.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-59057-PoC
Created by boroeurnprach

References

https://github.com/remix-run/react-router/security/adviso...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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