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Security audit

Otter.ai

Security checks for vulnerabilities and agentic risk

Overview

The Otter.ai reader has a coherent purpose, but its setup instructions can execute unverified remote installers without a clear user decision.

Review the setup behavior before installing. Prefer a separately reviewed, verified CLI installation and require approval before remote installer execution. Connecting Otter.ai lets OOMOL mediate access to private meeting data. Check the CLI's automatic bundled-skill installation behavior. No malicious behavior was established, but the remote installer and executable were not verified.

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
98% confidence
Finding

The supplied chunk performs remote installer execution and contains no Otter.ai search or read operation. No evidence establishes this installer as a necessary supporting dependency, so its behavior is not represented by the declared purpose. The downloaded script's contents and further effects are unknown.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command executes a remotely supplied, mutable script with the agent process's permissions without independently verifying its integrity; the PowerShell alternative has the same weakness. If the distribution endpoint or publishing pipeline is compromised, this could expose locally accessible credentials and files or modify the environment, despite the legitimate dependency-installation context and HTTPS transport.

Content

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

The setup workflow instructs the agent to execute downloaded installation scripts without warning the user about remote code execution and system changes.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

The missing-command fallback directs the agent to install software without first explaining the local system changes or obtaining approval, expanding a data-reading task into code execution. Restricting installation to a missing CLI reduces exposure, but a user's request to read Otter.ai data does not itself authorize installing software.

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 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