Is @mcp-b/react-webmcp safe to use?

@mcp-b/react-webmcp has a security risk score of 87.26/100 (CRITICAL risk). Our security analysis detected 70 findings. Review the detailed security assessment below to understand the specific risks before installation.

What are the security risks of @mcp-b/react-webmcp?

Based on our automated security analysis, @mcp-b/react-webmcp presents critical risk level. The extension is analyzed for malware patterns, secret exposure, network communications, permissions, and supply chain vulnerabilities.

How is the security score calculated?

Risky Plugins calculates security scores using weighted categories: severity of findings (25 points max), malware detections (35 points), secret exposure (28 points), network communications (10 points), and obfuscation (10 points). Scores range from 0-100, with higher scores indicating greater risk.

What does CRITICAL, HIGH, MEDIUM, LOW, MINIMAL risk mean?

CRITICAL (80-100): Severe security issues like malware. HIGH (60-79): Significant vulnerabilities. MEDIUM (40-59): Moderate security concerns. LOW (20-39): Minor issues. MINIMAL (0-19): Very low risk. Always review findings before installing any extension.

Is "@mcp-b/react-webmcp" on MCP Registry Safe to Install?

Name: @mcp-b/react-webmcp
Availability: InStock
Author: miguelspizza

miguelspizza · mcp · v2.2.0

React hooks for Model Context Protocol (MCP) - expose React components as AI tools for Claude, ChatGPT, Cursor, and Copilot with Zod validation

Risk Assessment

Analyzed

87.26

out of 100

CRITICAL

70 security findings detected across all analyzers

MCP server analyzed for tool poisoning, prompt injection, and data exfiltration

Severity Breakdown

Critical

High

Medium

Low

Info

Finding Categories

Malware Signatures

Secrets

IoC Indicators

YARA Rules Matched

6 rules(18 hits)

postinstall network communication postinstall file download postinstall system command postinstall file manipulation postinstall obfuscation postinstall registry modification

MCP Server Analysis

MCP servers expose tools and resources to AI assistants. Unlike browser extensions, they run as standalone processes with direct system access. Tool definitions are analyzed for prompt injection, data exfiltration, and tool poisoning patterns.

About This Extension

React hooks for Model Context Protocol (MCP) - expose React components as AI tools for Claude, ChatGPT, Cursor, and Copilot with Zod validation

Detailed Findings

23 total

YARA Rule Matches

6 rules

Indicators of Compromise

Network indicators, suspicious strings, and potential IoCs extracted during analysis

URLs

IP Addresses

Domains

Strings

All Indicators · 46

Domain

detected Domain: registry.npmjs.org

XIOC detected Domain: registry.npmjs.org

extracted_from_files

Domain

detected Domain: user.id

XIOC detected Domain: user.id

extracted_from_files

URL

detected URL: https://github.com/WebMCP-org/npm-packages/issues

XIOC detected URL: https://github.com/WebMCP-org/npm-packages/issues

extracted_from_files

URL

detected URL: https://github.com/WebMCP-org/npm-packages.git

XIOC detected URL: https://github.com/WebMCP-org/npm-packages.git

extracted_from_files

URL

detected URL: https://registry.npmjs.org/

XIOC detected URL: https://registry.npmjs.org/

extracted_from_files

URL

detected URL: https://docs.mcp-b.ai/packages/transports)

XIOC detected URL: https://docs.mcp-b.ai/packages/transports)

extracted_from_files

URL

detected URL: https://docs.mcp-b.ai/packages/chrome-devtools-mcp)

XIOC detected URL: https://docs.mcp-b.ai/packages/chrome-devtools-mcp)

extracted_from_files

URL

detected URL: https://docs.mcp-b.ai)

XIOC detected URL: https://docs.mcp-b.ai)

extracted_from_files

URL

detected URL: https://modelcontextprotocol.io)

XIOC detected URL: https://modelcontextprotocol.io)

extracted_from_files

URL

detected URL: https://spec.modelcontextprotocol.io/specification/server/tools/#output-schemas

XIOC detected URL: https://spec.modelcontextprotocol.io/specification/server/tools/#output-schemas

extracted_from_files

URL

detected URL: https://github.com/login/oauth/authorize?client_id=...'

XIOC detected URL: https://github.com/login/oauth/authorize?client_id=...'

extracted_from_files

Domain

detected Domain: react-webmcp-guide.md

XIOC detected Domain: react-webmcp-guide.md

extracted_from_files

URL

detected URL: https://docs.mcp-b.ai/packages/react-webmcp

XIOC detected URL: https://docs.mcp-b.ai/packages/react-webmcp

extracted_from_files

URL

detected URL: https://img.shields.io/badge/React-18+-61DAFB?style=flat-square&logo=react)](https://reactjs.org/)

XIOC detected URL: https://img.shields.io/badge/React-18+-61DAFB?style=flat-square&logo=react)](https://reactjs.org/)

extracted_from_files

URL

detected URL: https://docs.mcp-b.ai/packages/react-webmcp)**

XIOC detected URL: https://docs.mcp-b.ai/packages/react-webmcp)**

extracted_from_files

URL

detected URL: https://docs.mcp-b.ai/quickstart)**

XIOC detected URL: https://docs.mcp-b.ai/quickstart)**

extracted_from_files

URL

detected URL: https://docs.mcp-b.ai/ai-frameworks)**

XIOC detected URL: https://docs.mcp-b.ai/ai-frameworks)**

extracted_from_files

URL

detected URL: https://docs.mcp-b.ai/packages/global)

XIOC detected URL: https://docs.mcp-b.ai/packages/global)

extracted_from_files

Domain

detected Domain: rest.properties

XIOC detected Domain: rest.properties

extracted_from_files

Domain

detected Domain: method.call

XIOC detected Domain: method.call

extracted_from_files

Domain

detected Domain: servercapabilities.tools

XIOC detected Domain: servercapabilities.tools

extracted_from_files

Domain

detected Domain: response.tools

XIOC detected Domain: response.tools

extracted_from_files

Domain

detected Domain: img.shields.io

XIOC detected Domain: img.shields.io

extracted_from_files

URL

detected URL: https://img.shields.io/npm/v/@mcp-b/react-webmcp?style=flat-square)](https://www.npmjs.com/package/@mcp-b/react-webmcp)

XIOC detected URL: https://img.shields.io/npm/v/@mcp-b/react-webmcp?style=flat-square)](https://www.npmjs.com/package/@mcp-b/react-webmcp)

extracted_from_files

URL

detected URL: https://img.shields.io/npm/dm/@mcp-b/react-webmcp?style=flat-square)](https://www.npmjs.com/package/@mcp-b/react-webmcp)

XIOC detected URL: https://img.shields.io/npm/dm/@mcp-b/react-webmcp?style=flat-square)](https://www.npmjs.com/package/@mcp-b/react-webmcp)

extracted_from_files

Domain

detected Domain: tool.name

XIOC detected Domain: tool.name

extracted_from_files

Domain

detected Domain: index.d.ts.map

XIOC detected Domain: index.d.ts.map

extracted_from_files

Domain

detected Domain: t.properties

XIOC detected Domain: t.properties

extracted_from_files

Domain

detected Domain: r.call

XIOC detected Domain: r.call

extracted_from_files

Domain

detected Domain: date.now

XIOC detected Domain: date.now

extracted_from_files

Domain

detected Domain: e.tools

XIOC detected Domain: e.tools

extracted_from_files

Domain

detected Domain: index.js.map

XIOC detected Domain: index.js.map

extracted_from_files

Domain

detected Domain: modelcontextprotocol.io

XIOC detected Domain: modelcontextprotocol.io

extracted_from_files

Domain

detected Domain: spec.modelcontextprotocol.io

XIOC detected Domain: spec.modelcontextprotocol.io

extracted_from_files

Domain

detected Domain: github.com

XIOC detected Domain: github.com

extracted_from_files

URL

detected URL: https://img.shields.io/badge/TypeScript-5.0+-blue?style=flat-square)](https://www.typescriptlang.org/)

XIOC detected URL: https://img.shields.io/badge/TypeScript-5.0+-blue?style=flat-square)](https://www.typescriptlang.org/)

extracted_from_files

Domain

detected Domain: user.name

XIOC detected Domain: user.name

extracted_from_files

Domain

detected Domain: user.email

XIOC detected Domain: user.email

extracted_from_files

Domain

detected Domain: tools.map

XIOC detected Domain: tools.map

extracted_from_files

Domain

detected Domain: docs.mcp-b.ai

XIOC detected Domain: docs.mcp-b.ai

extracted_from_files

Domain

detected Domain: www.npmjs.com

XIOC detected Domain: www.npmjs.com

extracted_from_files

Domain

detected Domain: opensource.org

XIOC detected Domain: opensource.org

extracted_from_files

detected Domain: www.typescriptlang.org

XIOC detected Domain: www.typescriptlang.org

extracted_from_files

Domain

detected Domain: reactjs.org

XIOC detected Domain: reactjs.org

extracted_from_files

Domain

detected Domain: api.posts.like

XIOC detected Domain: api.posts.like

extracted_from_files

URL

detected URL: https://img.shields.io/badge/License-MIT-yellow.svg?style=flat-square)](https://opensource.org/licenses/MIT)

XIOC detected URL: https://img.shields.io/badge/License-MIT-yellow.svg?style=flat-square)](https://opensource.org/licenses/MIT)

extracted_from_files

Security Analysis Summary

Security Analysis Overview

@mcp-b/react-webmcp is a mcp extension published by miguelspizza. Version 2.2.0 has been analyzed by the Risky Plugins security platform, receiving a risk score of 87.26/100 (CRITICAL risk) based on 70 security findings.

Risk Assessment

This extension presents critical security risk. Severe issues were detected, potentially including malware indicators, exposed secrets, or dangerous behaviors. Installation is strongly discouraged until these issues are addressed.

Findings Breakdown

Critical: 1 finding(s)
High: 19 finding(s)
Medium: 47 finding(s)

What Was Analyzed

The security assessment covers multiple analysis categories:

Malware Detection: YARA rule matching against 2,400+ malware signatures
Secret Detection: Scanning for exposed API keys, tokens, and credentials
Static Analysis: Code-level security analysis for common vulnerability patterns
Network Analysis: Detection of suspicious network communications and endpoints
Obfuscation Detection: Identification of code obfuscation techniques

Developer Information

@mcp-b/react-webmcp is published by miguelspizza on the mcp marketplace.

Recommendation

This extension is not recommended for installation without thorough manual review. Consider alternatives with lower risk scores, or contact the developer to address the identified security concerns.

Source Code Viewer

Source Code Not Available

Source code is not available for this version of the extension.

Frequently Asked Questions

Similar Extensions

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Is "@mcp-b/react-webmcp" on MCP Registry Safe to Install?

Risk Assessment

Severity Breakdown

Finding Categories

YARA Rules Matched

MCP Server Analysis

About This Extension

Detailed Findings

MCP-TOOL-TOOL-POISONING-dist/index.d.ts-154

MCP-TOOL-CREDENTIAL-ACCESS-dist/index.d.ts-721

HASH-e43b375a4156ca47

HASH-316ca70a9c1246be

HASH-94c733ee952e0c92

YARA Rule Matches

postinstall network communication

postinstall file download

postinstall system command

postinstall file manipulation

postinstall obfuscation

postinstall registry modification

Indicators of Compromise

All Indicators · 46

Security Analysis Summary

Security Analysis Overview

Risk Assessment

Findings Breakdown

What Was Analyzed

Developer Information

Recommendation

Frequently Asked Questions

Similar Extensions

@mcp-b/chrome-devtools-mcp

@mcp-b/ext-apps

@mcp-b/webmcp-local-relay

@mcp-b/extension-tools

usewebmcp

@mcp-b/transports