Is @shmaxi/excel-mcp-server safe to use?

@shmaxi/excel-mcp-server has a security risk score of 86.52/100 (CRITICAL risk). Our security analysis detected 81 findings. Review the detailed security assessment below to understand the specific risks before installation.

What are the security risks of @shmaxi/excel-mcp-server?

Based on our automated security analysis, @shmaxi/excel-mcp-server 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 "@shmaxi/excel-mcp-server" on MCP Registry Safe to Install?

Name: @shmaxi/excel-mcp-server
Availability: InStock
Author: shmaxi

shmaxi · mcp · v0.1.0

Excel MCP Server for manipulating Excel files - Node.js implementation

Risk Assessment

Analyzed

86.52

out of 100

CRITICAL

81 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

5 rules(17 hits)

postinstall system command postinstall environment access credential env files postinstall network communication postinstall file manipulation

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

Excel MCP Server for manipulating Excel files - Node.js implementation

Detailed Findings

47 total

YARA Rule Matches

5 rules

Indicators of Compromise

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

URLs

Domains

Strings

All Indicators · 34

Domain

detected Domain: matches.map

XIOC detected Domain: matches.map

extracted_from_files

Domain

detected Domain: tool.name

XIOC detected Domain: tool.name

extracted_from_files

URL

detected URL: https://github.com/shmaxi/excel-mcp-server-node.git

XIOC detected URL: https://github.com/shmaxi/excel-mcp-server-node.git

extracted_from_files

URL

detected URL: https://github.com/shmaxi/excel-mcp-server-node/issues

XIOC detected URL: https://github.com/shmaxi/excel-mcp-server-node/issues

extracted_from_files

URL

detected URL: https://github.com/shmaxi/excel-mcp-server-node#readme

XIOC detected URL: https://github.com/shmaxi/excel-mcp-server-node#readme

extracted_from_files

Domain

detected Domain: workbook.worksheets.map

XIOC detected Domain: workbook.worksheets.map

extracted_from_files

Domain

detected Domain: ws.name

XIOC detected Domain: ws.name

extracted_from_files

Domain

detected Domain: workbook.js.map

XIOC detected Domain: workbook.js.map

extracted_from_files

Domain

detected Domain: worksheet.d.ts.map

XIOC detected Domain: worksheet.d.ts.map

extracted_from_files

Domain

detected Domain: newcell.style

XIOC detected Domain: newcell.style

extracted_from_files

Domain

detected Domain: args.new

XIOC detected Domain: args.new

extracted_from_files

Domain

detected Domain: range.d.ts.map

XIOC detected Domain: range.d.ts.map

extracted_from_files

Domain

detected Domain: targetcell.style

XIOC detected Domain: targetcell.style

extracted_from_files

Domain

detected Domain: sourcecell.style

XIOC detected Domain: sourcecell.style

extracted_from_files

Domain

detected Domain: cell.style

XIOC detected Domain: cell.style

extracted_from_files

Domain

detected Domain: worksheet.js.map

XIOC detected Domain: worksheet.js.map

extracted_from_files

Domain

detected Domain: range.js.map

XIOC detected Domain: range.js.map

extracted_from_files

Domain

detected Domain: workbook.d.ts.map

XIOC detected Domain: workbook.d.ts.map

extracted_from_files

Domain

detected Domain: chart.js.map

XIOC detected Domain: chart.js.map

extracted_from_files

Domain

detected Domain: data.d.ts.map

XIOC detected Domain: data.d.ts.map

extracted_from_files

Domain

detected Domain: data.js.map

XIOC detected Domain: data.js.map

extracted_from_files

Domain

detected Domain: format.d.ts.map

XIOC detected Domain: format.d.ts.map

extracted_from_files

Domain

detected Domain: format.js.map

XIOC detected Domain: format.js.map

extracted_from_files

Domain

detected Domain: index.d.ts.map

XIOC detected Domain: index.d.ts.map

extracted_from_files

Domain

detected Domain: index.js.map

XIOC detected Domain: index.js.map

extracted_from_files

Domain

detected Domain: cli.js.map

XIOC detected Domain: cli.js.map

extracted_from_files

Domain

detected Domain: server.d.ts.map

XIOC detected Domain: server.d.ts.map

extracted_from_files

Domain

detected Domain: github.com

XIOC detected Domain: github.com

extracted_from_files

Domain

detected Domain: server.js.map

XIOC detected Domain: server.js.map

extracted_from_files

Domain

detected Domain: chart.d.ts.map

XIOC detected Domain: chart.d.ts.map

extracted_from_files

Domain

detected Domain: args.data

XIOC detected Domain: args.data

extracted_from_files

Domain

detected Domain: args.target

XIOC detected Domain: args.target

extracted_from_files

Domain

detected Domain: cli.d.ts.map

XIOC detected Domain: cli.d.ts.map

extracted_from_files

Domain

detected Domain: worksheet.name

XIOC detected Domain: worksheet.name

extracted_from_files

Security Analysis Summary

Security Analysis Overview

@shmaxi/excel-mcp-server is a mcp extension published by shmaxi. Version 0.1.0 has been analyzed by the Risky Plugins security platform, receiving a risk score of 86.52/100 (CRITICAL risk) based on 81 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

High: 30 finding(s)
Medium: 48 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

@shmaxi/excel-mcp-server is published by shmaxi 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

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Risk Assessment

Severity Breakdown

Finding Categories

YARA Rules Matched

MCP Server Analysis

About This Extension

Detailed Findings

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/worksheet.js-147

MCP-TOOL-CREDENTIAL-ACCESS-dist/cli.js-22

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/worksheet.js-79

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/format.js-215

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/worksheet.js-111

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/format.js-102

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/range.js-123

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/range.js-63

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/format.js-138

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/workbook.js-29

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/format.js-174

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/worksheet.js-28

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/data.js-48

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/worksheet.js-22

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/worksheet.js-141

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/format.js-132

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/data.js-34

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/data.js-79

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/format.js-208

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/chart.js-80

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/worksheet.js-105

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/workbook.js-52

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/range.js-99

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/format.js-168

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/worksheet.js-58

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/format.js-64

MCP-TOOL-FILESYSTEM-ACCESS-dist/tools/range.js-34

HASH-8d1a47f275a77ea9

HASH-2c7071eacae5cd69

HASH-6e3f371a940a4293

YARA Rule Matches

postinstall system command

postinstall environment access

credential env files

postinstall network communication

postinstall file manipulation

Indicators of Compromise

All Indicators · 34

Security Analysis Summary

Security Analysis Overview

Risk Assessment

Findings Breakdown

What Was Analyzed

Developer Information

Recommendation

Frequently Asked Questions

Similar Extensions

teams-mcp-server

@koneksi/mcp-server

@youtyan/browser-pilot

@iflow-mcp/intuit-quickbooks-online-mcp-server

@nitrostack/core

update-browserslist-db