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Security audit

CoinGecko

Security checks for vulnerabilities and agentic risk

Overview

The CoinGecko workflow fits its purpose, but setup can execute unverified remote code and introduce broader changes to agent skills without explicit approval.

Review setup before installing. Provision a verified CLI version yourself and require approval before remote installers run. Consider disabling the CLI's automatic skill synchronization. CoinGecko requests pass through OOMOL and may consume credits. The remote installer and server implementation were not verified.

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied code executes an external installer rather than performing the declared CoinGecko operations. Although dependency installation can be a supporting implementation detail, this chunk provides no evidence connecting the Oomol installer to CoinGecko functionality. The downloaded script's contents and any further effects are not available for assessment.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
93% confidence
Finding

The supplied code contains only an authentication command. It shows neither CoinGecko data access nor evidence that this login is a supporting step for CoinGecko operations. Its observable purpose therefore differs materially from the declared data-search and reading purpose.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command streams a mutable remote script directly into Bash without a pinned version, independently verified integrity, or review before execution; the PowerShell alternative has the same issue. If the distribution endpoint or its supply chain is compromised, the installer can execute arbitrary commands with the invoking user's privileges, potentially exposing local credentials and files. Its legitimate setup purpose and HTTPS transport reduce suspicion of deliberate malice but do not remove this execution risk.

Content

Scanner excerpt · SKILL.md (reported line 79)May include surrounding context.

First-time setup executes remote installation scripts without a system-change warning.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The missing-CLI fallback directs the agent to install software without explicitly warning about local system changes or requesting approval. Although installation supports the stated workflow and is conditional, a read-only data request does not itself authorize downloading and executing an installer; actual execution also depends on the host's tool restrictions.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% 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 · SKILL.md (reported line 100)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources