Bitly

• Outcome: Review
• Latest audit: Nov 4, 2026 · 5:48 AM UTC
• Version: 1.0.5

Overview

The Bitly operations are well scoped, but automatic setup executes unverified software whose documented effects extend to other agent skills.

Review the CLI setup before installing. Prefer a reviewed, version-pinned installation and disable startup skill synchronization with OO_SKILLS_SYNC_DISABLED=1 before invoking it if you do not want changes to other agents' skills. OOMOL will hold your connected Bitly credentials and process connector requests. Preserve confirmation for link changes. The remote installer itself remains unverified; no malicious behavior was established.

A.I.G

Vulnerability Patterns

• Skill Instruction Hijacking: Alters the agent's session goals or safety constraints when the skill loads
• Agent Memory Poisoning: Writes attacker-controlled rules into memory that affect later sessions
• Remote Payload Retrieval and Execution: Fetches external code whose behavior can change after review
• Embedded Malicious Code: Ships malicious scripts inside the skill and executes them locally
• Unauthorized Access and Privilege Escalation: Obtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns

• Supply Chain: Unpinned Dependencies, External Script Fetching, Obfuscated Code
• Excessive Agency: Unrestricted Tool Access, Autonomous Decision Making, Scope Creep
• MCP Tool Poisoning: Hidden Instructions, Unicode Deception, Parameter Description Injection
• Prompt Injection: Instruction Override, Hidden Instructions, Exfiltration Commands
• Data Exfiltration: External Transmission, Env Variable Harvesting, File System Enumeration

Findings (3)

Description-Behavior Mismatch

High

• Category: MCP Tool Poisoning
• Confidence: 93% confidence

Finding

The declared purpose concerns Bitly data operations, but the supplied code runs an installer from a different service. Nothing in the chunk establishes that this installer is a supporting dependency for Bitly functionality. The downloaded script's contents and subsequent effects cannot be determined from the supplied code.

Content

No source excerpt is available for this finding.

External Script Fetching

High

• Category: Supply Chain
• Confidence: 98% confidence

Finding

The setup command executes a mutable remote script directly in Bash without verifying its contents or integrity; the PowerShell alternative uses the same unsafe pattern. Compromise of the distribution endpoint could therefore execute arbitrary code with the agent process's permissions. The legitimate dependency-installation context and missing-command condition reduce exposure but do not remove this supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

• oo: command not found — install the oo CLI (other platforms: https://cli.oomol.com/install-guide.md):

  bash

  curl -fsSL https://cli.oomol.com/install.sh | bash    # macOS / Linux
  

  powershell

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