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Security audit

watchpost

Security checks for vulnerabilities and agentic risk

Overview

The skill is a disclosed Watchpost purchase-check helper that sends bounded purchase details to a fixed Watchpost API and does not make payments or approve reviews itself.

Install only if you are comfortable creating a Watchpost account and letting the helper send intended purchase details and relevant listing evidence to Watchpost. Keep tokens in secret settings, do not include cookies or payment details in listing evidence, and treat any approval as advisory within your own payment authorization.

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 (3)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 38)May include surrounding context.

md
`{baseDir}` to that path; on other hosts resolve it from this `SKILL.md` location.

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
75% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · scripts/cli.mjs (reported line 63)May include surrounding context.

js
6: "already completed",
				},
				message:
					"Run from the installed skill's scripts directory or use an absolute script path. Local commands make no network requests and grant no approval.",
			},
		};
	return undefined;

Static analysis

No suspicious patterns detected.