Back to skill

Security audit

Leadfeeder

Security checks for vulnerabilities and agentic risk

Overview

The Leadfeeder functions fit the stated purpose, but setup directs the agent to execute changing remote code without a clear user checkpoint.

Review and install the CLI yourself before use, control any automatic skill synchronization, and connect only the intended Leadfeeder account. Consider whether you trust OOMOL to process your requests and connected-account access. The complete bundled artifact was inspected, but the changing installer and backend behavior remain unverified. No artifact-backed malicious behavior was found.

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 (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
95% confidence
Finding

The supplied code performs remote script execution for an Oomol CLI installation, while the description promises Leadfeeder data access. No connection between this installation and the declared functionality is established in the supplied chunk. The remote script's contents and any additional effects cannot be determined from this code alone.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a remotely fetched script directly into Bash executes mutable external code without a pinned version, independent integrity verification, or inspection; the PowerShell alternative has the same weakness. Compromise of the distribution endpoint or release process could execute attacker-controlled commands with the agent's local permissions, although this path is conditional on the CLI being absent.

Content

Scanner excerpt · SKILL.md (reported line 61)May include surrounding context.

The fallback setup instructs the agent to execute remote installer scripts without warning about system changes.

Medium
Category
Output Handling
Confidence
92% confidence
Finding

The fallback directs the agent to install software without first obtaining approval or explaining that installation executes code and changes the local environment. Restricting setup to a missing-command error reduces exposure, but a request to read Leadfeeder data does not itself authorize software installation.

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 82)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