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Security audit

Permit.io

Security checks for vulnerabilities and agentic risk

Overview

Permit.io changes require approval, but the CLI setup can run unverified remote code and introduce additional persistent agent skills without clearly disclosing those effects.

Review and approve CLI installation separately before allowing automatic setup. Set OO_SKILLS_SYNC_DISABLED=1 in the agent environment unless you want additional managed skills installed. Connect a narrowly scoped Permit.io account through OOMOL and verify each proposed change. The complete bundled skill was inspected, but remote installer contents and connector behavior remain unverified.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied code installs software from an Oomol endpoint rather than performing any visible Permit.io operation. Nothing in the chunk establishes this installation as a supporting requirement for the declared purpose. The remote script's contents and downstream effects are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command downloads a mutable remote script and immediately executes it with the agent process's local permissions, without a pinned version or independent integrity verification. A compromised distribution endpoint could consequently execute arbitrary code and access local files or credentials; the missing-CLI condition limits exposure but does not remove the risk, and the PowerShell alternative has the same weakness.

Content

Scanner excerpt · SKILL.md (reported line 67)May include surrounding context.

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 88)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