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Security audit

Speechmatics

Security checks for vulnerabilities and agentic risk

Overview

The Speechmatics integration is clearly described, but setup permits downloaded code execution and does not disclose the CLI’s broader changes to agent skills.

Review setup before enabling this skill. Install a verified CLI release yourself and decide whether to allow its additional agent skills; upstream documents OO_SKILLS_SYNC_DISABLED=1 to disable startup skill synchronization in its [command reference](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md#environment-variables). OOMOL mediates your connected Speechmatics account and requests. The exact remote installers remain unverified; the reviewed artifact does not establish theft, deception, or destructive behavior.

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
97% confidence
Finding

The supplied code installs software from Oomol and shows no Speechmatics interaction or evidence that this installation supports the declared functionality. This is an undeclared capability and uses an inconsistent resource. The remote script's contents are not supplied, so its specific installation actions and side effects cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a mutable HTTPS response directly into bash executes remote code without first verifying its contents or provenance beyond transport security. Compromise of the installer publisher or hosting infrastructure could expose local files and credentials or establish persistence under the executing account; the legitimate dependency context does not remove this supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 59)May include surrounding context.

First-time setup executes remotely downloaded scripts without warning the user about the system-integrity risk.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The setup instructions direct the agent to execute downloaded shell or PowerShell code without requiring user approval or integrity verification. A compromised installer or distribution endpoint could execute arbitrary code with the agent's local permissions; limiting installation to a missing-CLI error reduces frequency but does not mitigate that exposure.

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 80)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