Is "flow-mcp-server" on MCP Registry Safe to Install?

outblock · mcp · v1.2.26

Model Context Protocol (MCP) server for Flow blockchain with direct RPC communication

Risk Assessment

Analyzed
100
out of 100
CRITICAL

116 security findings detected across all analyzers

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

Severity Breakdown

0
Critical
54
High
33
Medium
0
Low
0
Info

Finding Categories

45
Malware Signatures
8
Secrets
32
IoC Indicators

YARA Rules Matched

12 rules(45 hits)
postinstall file manipulation postinstall system command HavingAPermissiveCrossOriginResourceSharingPolicy postinstall network communication NoUseWeakRandom postinstall file download UsingCommandLineArguments postinstall environment access credential env files postinstall obfuscation postinstall registry modification postinstall crypto operations

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

Model Context Protocol (MCP) server for Flow blockchain with direct RPC communication

Detailed Findings

83 total

YARA Rule Matches

12 rules

Indicators of Compromise

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

URLs
12
IP Addresses
1
Domains
19
Strings
32

All Indicators · 32

IP
detected IP: 0.0.0.0

XIOC detected IP: 0.0.0.0

extracted_from_files

URL
detected URL: https://github.com/outblock/flow-mcp-server#readme

XIOC detected URL: https://github.com/outblock/flow-mcp-server#readme

extracted_from_files

Domain
detected Domain: formattedargs.map

XIOC detected Domain: formattedargs.map

extracted_from_files

Domain
detected Domain: t.int

XIOC detected Domain: t.int

extracted_from_files

Domain
detected Domain: result.events

XIOC detected Domain: result.events

extracted_from_files

Domain
detected Domain: access.mainnet.nodes.onflow.org

XIOC detected Domain: access.mainnet.nodes.onflow.org

extracted_from_files

Domain
detected Domain: access.testnet.nodes.onflow.org

XIOC detected Domain: access.testnet.nodes.onflow.org

extracted_from_files

URL
detected URL: https://keepachangelog.com/en/1.0.0/),

XIOC detected URL: https://keepachangelog.com/en/1.0.0/),

extracted_from_files

URL
detected URL: https://semver.org/spec/v2.0.0.html).

XIOC detected URL: https://semver.org/spec/v2.0.0.html).

extracted_from_files

URL
detected URL: https://access.testnet.nodes.onflow.org:9000';

XIOC detected URL: https://access.testnet.nodes.onflow.org:9000';

extracted_from_files

Domain
detected Domain: rest-testnet.onflow.org

XIOC detected Domain: rest-testnet.onflow.org

extracted_from_files

Domain
detected Domain: params.network

XIOC detected Domain: params.network

extracted_from_files

Domain
detected Domain: flow.network

XIOC detected Domain: flow.network

extracted_from_files

Domain
detected Domain: app.post

XIOC detected Domain: app.post

extracted_from_files

Domain
detected Domain: process.env.host

XIOC detected Domain: process.env.host

extracted_from_files

Domain
detected Domain: account.keys.map

XIOC detected Domain: account.keys.map

extracted_from_files

Domain
detected Domain: keepachangelog.com

XIOC detected Domain: keepachangelog.com

extracted_from_files

Domain
detected Domain: semver.org

XIOC detected Domain: semver.org

extracted_from_files

Domain
detected Domain: github.com

XIOC detected Domain: github.com

extracted_from_files

Domain
detected Domain: event.data

XIOC detected Domain: event.data

extracted_from_files

Domain
detected Domain: readme.md

XIOC detected Domain: readme.md

extracted_from_files

Domain
detected Domain: changelog.md

XIOC detected Domain: changelog.md

extracted_from_files

Domain
detected Domain: notes.md

XIOC detected Domain: notes.md

extracted_from_files

URL
detected URL: https://rest-testnet.onflow.org',

XIOC detected URL: https://rest-testnet.onflow.org',

extracted_from_files

URL
detected URL: https://rest-mainnet.onflow.org',

XIOC detected URL: https://rest-mainnet.onflow.org',

extracted_from_files

URL
detected URL: https://rest-mainnet.onflow.org'

XIOC detected URL: https://rest-mainnet.onflow.org'

extracted_from_files

URL
detected URL: https://github.com/outblock/flow-mcp-server/issues

XIOC detected URL: https://github.com/outblock/flow-mcp-server/issues

extracted_from_files

URL
detected URL: https://rest-testnet.onflow.org');

XIOC detected URL: https://rest-testnet.onflow.org');

extracted_from_files

URL
detected URL: https://access.mainnet.nodes.onflow.org:9000';

XIOC detected URL: https://access.mainnet.nodes.onflow.org:9000';

extracted_from_files

URL
detected URL: https://github.com/outblock/flow-mcp-server.git

XIOC detected URL: https://github.com/outblock/flow-mcp-server.git

extracted_from_files

URL
detected URL: https://github.com/lmcmz/flow-mcp-server.git

XIOC detected URL: https://github.com/lmcmz/flow-mcp-server.git

extracted_from_files

Domain
detected Domain: rest-mainnet.onflow.org

XIOC detected Domain: rest-mainnet.onflow.org

extracted_from_files

Security Analysis Summary

Security Analysis Overview

flow-mcp-server is a mcp extension published by outblock. Version 1.2.26 has been analyzed by the Risky Plugins security platform, receiving a risk score of 100/100 (CRITICAL risk) based on 116 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: 54 finding(s)
  • Medium: 33 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

flow-mcp-server is published by outblock 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.

Frequently Asked Questions