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Security audit

QQ Mail

Security checks for vulnerabilities and agentic risk

Overview

The mail controls are clear, but setup can run unverified remote software without asking for installation approval.

Review and approve a verified CLI installation separately, including its automatic agent-skill synchronization settings. Connecting QQ Mail gives OOMOL-mediated access to your mailbox. The skill requires approval for mail changes, but its external installer and connector implementation were not verified.

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
  • 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 only visible behavior is remote software installation, rather than QQ Mail interaction. Installation could support a mail integration, but the supplied code establishes no such relationship. The downloaded script's contents and any further effects are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command pipes a mutable remote installer directly into Bash without checking a pinned version, signature, or independently trusted digest; the PowerShell alternative has the same execution pattern. If the distribution endpoint or publishing pipeline is compromised, attacker-controlled code could execute with the agent process's privileges and access local files or credentials.

Content

Scanner excerpt · SKILL.md (reported line 66)May include surrounding context.

The setup fallback executes downloaded installer scripts without warning the user about remote code execution or system changes.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The missing-CLI fallback instructs the agent to execute downloaded shell or PowerShell code without a separate approval step explaining the installation and system changes. Restricting this to a command-not-found error reduces exposure, but a request to operate email does not necessarily authorize installing executable 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 87)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