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Security audit

sato-hub

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Sato Hub lookup and routing helper that contacts satohub.ai and does not show hidden local persistence, credential theft, or fund-moving behavior.

Install only if you are comfortable sending Sato Hub the queries you ask it to check, such as repo/package names, endpoint URLs, token addresses, and route parameters. Do not paste real secrets, private keys, bearer tokens, or sensitive MCP configs into the preflight tools unless you have intentionally scrubbed them.

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (9)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 53)May include surrounding context.

md
scripts/query.sh search_resources '{"query":"x402","limit":3}'

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 54)May include surrounding context.

md
scripts/query.sh search_resources '{"query":"x402","limit":3}'

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 55)May include surrounding context.

md
scripts/query.sh search_resources '{"query":"x402","limit":3}'

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 56)May include surrounding context.

md
scripts/query.sh search_resources '{"query":"x402","limit":3}'

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 57)May include surrounding context.

md
scripts/query.sh search_resources '{"query":"x402","limit":3}'

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

md
scripts/query.sh search_resources '{"query":"x402","limit":3}'

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
92% confidence
Finding

The skill advertises use of a bundled shell script (scripts/query.sh) and requires bash/curl, but it does not declare an explicit tool scope such as permissions or allowed-tools. That mismatch can cause an agent or user to invoke shell capabilities without a clear least-privilege boundary, increasing the risk of unintended command execution or unsafe installation patterns when the skill is used in automation.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · references/examples.md (reported line 158)May include surrounding context.

md
move; re-run before quoting. Every one of these is read-only: **nothing signs,
holds a key, deploys, relays or moves funds.**

Each example shows equivalent calls — raw curl (JSON-RPC over the MCP
endpoint), the bundled script, and the plain REST route.

## 7. Preflight a repo before you install it

External Transmission

Medium
Category
Data Exfiltration
Confidence
70% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · scripts/query.sh (reported line 37)May include surrounding context.

sh
}

mcp_post() {
  /usr/bin/env curl -sS --max-time "$TIMEOUT" -X POST "$ENDPOINT" \
    -H 'Content-Type: application/json' \
    -H 'Accept: application/json, text/event-stream' \
    --data "$1"