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Security audit

Sina Market

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Sina Finance market-data helper that fetches public quote data and does not show hidden persistence, credential access, or destructive behavior.

Install only if you are comfortable with the skill making public web requests to Sina Finance for the symbols you ask it to inspect. It should be treated as an informational quote helper, not an authoritative trading or financial decision system.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (2)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
92% confidence
Finding

The skill appears to require network access and likely file reads, but SKILL.md does not declare any tool scope restrictions such as allowed-tools or permissions. In an agent environment, undeclared capabilities weaken policy enforcement and make it easier for the skill to access broader tools than reviewers or orchestrators expect, especially for a network-fetching skill that processes user-supplied symbols and external content.

Content

No source excerpt is available for this finding.

Context-Inappropriate Capability

Low
Category
Not specified by scanner
Confidence
82% confidence
Finding

The manifest describes user-oriented quote lookup, inspection, code validation, and futures metadata workflows, but this file also exposes a separate coverage-test command intended for batch testing across internal resolution modes. That testing harness is not obviously required for end-user market-data retrieval and is not mentioned in the manifest description.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.