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Security audit

CoinMarketCal

Security checks for vulnerabilities and agentic risk

Overview

The skill is coherent for CoinMarketCal use, but its setup instructions tell users to execute remote installer scripts directly without verification.

Install only after reviewing and verifying the oo CLI installer through a trusted OOMOL release or package source. Normal CoinMarketCal read actions are purpose-aligned, but avoid letting an agent run the documented remote installer automatically.

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:59
Finding

Unverified Remote Installation Scripts Executed Directly by Shells

Content
View full analysis
Remediation
View remediation
/install.sh" printf '%s %s\n' "" "oo-install.sh" | sha256sum --check bash oo-install.sh ``` The release URL and digest must be pinned to a reviewed version, and the script should only be executed after successful verification and user approval. ]]>

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
97% confidence
Finding

The skill instructs users to install software by piping a remotely fetched script directly into bash, which executes unverified code from the network without integrity checking or review. If the hosting domain, transport, or upstream script is compromised, this becomes an immediate arbitrary code execution vector on the user's machine.

Content

Scanner excerpt · SKILL.md (reported line 59)May include surrounding context.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The manifest description defines activation in very broad terms that could match a wide range of casual or incidental CoinMarketCal-related requests. It does not provide limiting conditions, exclusions, or examples clarifying when the skill should not be invoked.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.