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Security audit

Microsoft Teams

Security checks for vulnerabilities and agentic risk

Overview

The skill is a clearly disclosed Microsoft Teams connector skill, with expected Teams read/write capability and user-confirmation rules for writes, though users should review the CLI installer before running it.

Install this only if you trust OOMOL with access to your Microsoft Teams data. Review the oo CLI installer before using the pipe-to-shell setup commands, and confirm exact recipients, channels, and message contents before allowing write actions.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (2)

External Script Fetching

High
Category
Supply Chain
Content
- **`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
Confidence
97% confidence
Finding
The skill instructs users to install the CLI via a remote script piped directly into a shell, which is a classic supply-chain and remote code execution risk. If the install endpoint, transport, or upstream distribution is compromised, arbitrary code could execute on the user's machine with the user's privileges.

Vague Triggers

Medium
Confidence
94% confidence
Finding
The description says to use this skill for "ANY Microsoft Teams request" and "Whenever a task involves Microsoft Teams," which is broader than a narrowly scoped trigger and overlaps many ordinary requests about Teams. The file does not provide exclusion conditions or negative examples to clarify when the skill should not activate.

Static analysis

No suspicious patterns detected.