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Security audit

Fathom Analytics

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for managing Fathom Analytics, but its setup instructions include unverified remote installer commands that can run arbitrary code on a user's machine.

Review the first-time setup path before installing. Prefer installing the oo CLI from verified, versioned vendor instructions, and do not let an agent run remote installer scripts automatically. Once the CLI is installed and connected, confirm exact payloads before any Fathom write action.

A.I.G

Vulnerability Patterns
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • 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
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Findings (1)

T03 · Remote Payload Retrieval and Execution

Error
Location
SKILL.md:69
Finding

Unverified Remote Installer Scripts Executed Directly by Shells

Content
View full analysis
Remediation
View remediation
/install.sh" printf '%s %s\n' '' 'oo-install.sh' | sha256sum --check - less oo-install.sh bash oo-install.sh ``` The actual release URL and digest must come from the vendor's authenticated, versioned release process; placeholders must not be used operationally. ]]>

SkillSpector

Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • 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)

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The skill instructs the agent to install software by piping a remotely fetched script directly into a shell (curl ... | bash). This is dangerous because it executes unverified code from the network, so a compromised host, CDN, DNS path, or publisher account could lead to arbitrary code execution on the user's machine.

Content

Scanner excerpt · SKILL.md (reported line 69)May include surrounding context.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill description says to use this skill for "ANY Fathom Analytics request" and "Whenever a task involves Fathom Analytics," which creates an overly broad trigger surface. This can cause the agent to invoke the skill on casual mentions or ambiguous requests, increasing the chance of unintended reads or writes through the connected account.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.