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Security audit

Plausible Analytics

Security checks for vulnerabilities and agentic risk

Overview

This skill uses your Plausible API key to query website analytics and shows no hidden persistence, unrelated access, or destructive behavior.

Install this only if you want agents to use your PLAUSIBLE_API_KEY to query Plausible for site IDs you are authorized to access. Expect returned analytics such as visitors, pageviews, sources, pages, referrers, devices, browsers, operating systems, and countries to appear in agent output.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (16)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 29)May include surrounding context.

md
node scripts/stats.mjs example.com --period day

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 52)May include surrounding context.

md
node scripts/stats.mjs example.com --period day

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 62)May include surrounding context.

md
node scripts/stats.mjs example.com --period day

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 65)May include surrounding context.

md
node scripts/stats.mjs example.com --period day

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 68)May include surrounding context.

md
node scripts/stats.mjs example.com --period day

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 148)May include surrounding context.

md
node scripts/stats.mjs example.com --period day

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 37)May include surrounding context.

md
node scripts/realtime.mjs <site-id>

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 149)May include surrounding context.

md
node scripts/realtime.mjs <site-id>

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 96)May include surrounding context.

md
node scripts/breakdown.mjs <site-id> <property> [--period day|7d|30d] [--limit N]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 112)May include surrounding context.

md
node scripts/breakdown.mjs <site-id> <property> [--period day|7d|30d] [--limit N]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 115)May include surrounding context.

md
node scripts/breakdown.mjs <site-id> <property> [--period day|7d|30d] [--limit N]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 118)May include surrounding context.

md
node scripts/breakdown.mjs <site-id> <property> [--period day|7d|30d] [--limit N]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 150)May include surrounding context.

md
node scripts/breakdown.mjs <site-id> <property> [--period day|7d|30d] [--limit N]

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
91% confidence
Finding

The skill requires environment access to an API key and performs network-backed analytics queries, but it does not declare an explicit tool scope such as permissions or allowed-tools. That creates an authorization ambiguity where an agent may invoke code with broader capabilities than the skill contract makes visible, reducing reviewability and increasing the chance of unintended secret use or outbound requests.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
88% confidence
Finding

The documentation does not clearly warn that running the scripts sends site identifiers and authenticated requests to an external third-party service using the user's API key. In an agent context, this weakens informed consent and can cause users to expose sensitive business telemetry or query the wrong property without realizing data is being transmitted off-platform.

Content

No source excerpt is available for this finding.

Vague Triggers

Low
Category
Not specified by scanner
Confidence
89% confidence
Finding

This markdown file includes a wide activation-style description covering many common intents such as checking visitors, analyzing sources, and generating reports. Without explicit trigger boundaries or exclusion examples, the skill could be invoked for a broad range of ordinary analytics requests beyond the author's intended scope.

Content

No source excerpt is available for this finding.

Static analysis

Detected: suspicious.env_credential_access

Environment variable access combined with network send.

Critical
Code
suspicious.env_credential_access
Location
scripts/breakdown.mjs:20

Environment variable access combined with network send.

Critical
Code
suspicious.env_credential_access
Location
scripts/realtime.mjs:10

Environment variable access combined with network send.

Critical
Code
suspicious.env_credential_access
Location
scripts/stats.mjs:10