CVE-2025-59057Network attack vector

JavaScript execution via unescaped JSON-LD metadata

Published Jan 10, 2026 · Updated Jan 10, 2026

Cross-site scripting in React Router's Meta API allows remote authenticated users to execute JavaScript through server-rendered JSON-LD. The Meta component serializes script:ld+json data with JSON.stringify and writes the raw result through dangerouslySetInnerHTML without escaping HTML-significant characters. Exploitation requires Framework Mode, SSR, attacker-influenced metadata, and a user who loads the rendered page; Declarative and Data Modes are unaffected.

CVSS severity7.6
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in React Router's Meta API allows remote authenticated users to execute JavaScript through server-rendered JSON-LD. The Meta component serializes script:ld+json data with JSON.stringify and writes the raw result through dangerouslySetInnerHTML without escaping HTML-significant characters. Exploitation requires Framework Mode, SSR, attacker-influenced metadata, and a user who loads the rendered page; Declarative and Data Modes are unaffected.

The record

CVE
CVE-2025-59057
Published
Jan 10, 2026
Updated
Jan 10, 2026
Vendor
Shopify
Product
React Router
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=react-router >= 7.0.0, < 7.9.0
  2. Affected versionversion=@remix-run/react >= 1.15.0, < 2.17.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shopify · React Routerversion=react-router >= 7.0.0, < 7.9.0; version=@remix-run/react >= 1.15.0, < 2.17.1

Published CVSS scores

7.6GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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