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Security audit

Doubao Speech

Security checks for vulnerabilities and agentic risk

Overview

The speech workflow is reasonable, but its required tool can persistently add skills to other agent tools without this skill explaining that behavior.

Review the CLI's installation and cross-agent skill changes before proceeding. Prefer a verified release and disable startup skill syncing with OO_SKILLS_SYNC_DISABLED=1 if those changes are unwanted, as described in the [CLI reference](https://raw.githubusercontent.com/oomol-lab/oo-cli/main/docs/commands.md). Approve speech payloads knowing they pass through OOMOL to Doubao Speech. The sole bundled file was inspected; remote installer contents and hosted connector behavior remain unverified.

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
96% confidence
Finding

The supplied code performs remote script execution rather than any visible Doubao Speech operation. Dependency installation could be a supporting implementation detail, but this chunk provides no evidence that the installer supports the declared purpose. The downloaded script's contents and any further 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 instructions pipe a remotely fetched, unpinned script directly into Bash, and the PowerShell alternative uses the same fetch-and-execute pattern. If the distribution endpoint or release infrastructure is compromised, following these instructions could execute attacker-controlled code with the invoking user's permissions; the missing-CLI prerequisite limits exposure but does not remove this supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

The action workflow lacks a privacy warning about sending speech inputs through OOMOL to Doubao Speech.

Medium
Category
Output Handling
Confidence
87% confidence
Finding

The workflow instructs the agent to send action payloads through the connector, including inputs for speech-recognition and text-to-speech tasks. Although the file identifies the services and requires confirmation for writes, it does not warn that submitted text or recording inputs are shared with third-party services.

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 79)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