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Security audit

DuoPlus Cloud Number

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed DuoPlus API helper with user-confirmed billing actions and no evidence of hidden persistence, exfiltration, or unrelated behavior.

Install only if you intend to let the agent manage DuoPlus cloud numbers and see SMS verification messages. Review previews carefully before approving purchases, renewals, or auto-renewal, and do not set DUOPLUS_API_BASE to any non-DuoPlus domain.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
88% confidence
Finding

The skill invokes a Python client, uses environment variables for API configuration, and performs outbound API calls, but it does not declare any explicit tool scope such as allowed tools or permissions. That creates an authorization gap where the runtime may permit broader capabilities than reviewers and policy tooling can easily verify, increasing the risk of unintended network access or secret exposure through environment handling.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
94% confidence
Finding

The client hard-codes the request header Lang to en, which imposes a specific language/locale on all API interactions. This is a natural-language policy concern because the skill does not offer a user opt-in or configuration mechanism for language selection.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.