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Security audit

Bookingmood

Security checks for vulnerabilities and agentic risk

Overview

The Bookingmood read functions fit the stated purpose, but setup can execute changing remote code and introduce broader agent changes without clear user approval.

Review setup before enabling this skill. Install a verified CLI version separately with your approval, check its automatic agent-skill installation settings, and authorize only the Bookingmood access you need. The remote installer and hosted connector implementation remain outside the inspected package; the artifacts do not establish malicious intent.

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 (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied command performs remote installer execution, not Bookingmood searching or reading. Nothing in the supplied chunk establishes the installer as a supporting dependency for Bookingmood access. This adds an undeclared local execution and installation capability. The downloaded script's contents and any further effects cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
84% confidence
Finding

The supplied chunk performs authentication rather than searching or reading Bookingmood data. Authentication could be a supporting implementation detail, but nothing in this chunk connects the login to Bookingmood or implements the declared functionality.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

Piping an HTTPS download directly into Bash executes mutable remote content without a pinned version, signature verification, or an inspection step. Compromise of the installer host or its delivery pipeline could therefore execute arbitrary code with the agent process's permissions; the Windows example has the same issue.

Content

Scanner excerpt · SKILL.md (reported line 57)May include surrounding context.

First-time setup executes remote installation scripts without warning the user about system changes or remote-code execution.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The setup fallback instructs the agent to execute downloaded shell or PowerShell code without requiring informed approval for installation or local system changes. Although triggered only when the CLI is missing, this expands a read-only Bookingmood request into local code execution with the agent process's permissions.

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 78)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