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Security audit

Pinboard

Security checks for vulnerabilities and agentic risk

Overview

The Pinboard workflow includes approval safeguards, but its required CLI can also change installed agent skills without clearly disclosing those effects.

Review the CLI installation and its effects on other agents before proceeding. Use a reviewed CLI release and set OO_SKILLS_SYNC_DISABLED=1 if you do not want automatic skill synchronization, as documented in the [CLI controls](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md#environment-variables). OOMOL will mediate your Pinboard requests. The remote installer and hosted connector were not fully verified; the review concern is under-disclosed local changes, with no evidence of intentional data theft.

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
  • 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 performs remote installer execution rather than any visible Pinboard operation. Although installation can be a supporting implementation detail, this chunk provides no evidence that the Oomol installer supports the declared Pinboard functionality. The downloaded 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 instructions pipe a remotely fetched, unpinned script directly into Bash, allowing its contents to execute with the agent process's permissions without prior integrity verification. The domain is relevant to the required dependency and installation is conditional, which reduces suspicion of malicious intent, but a compromised distribution endpoint could still enable local data theft or modification; the PowerShell alternative has the same underlying risk.

Content

Scanner excerpt · SKILL.md (reported line 60)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 81)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