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Security audit

KlickTipp

Security checks for vulnerabilities and agentic risk

Overview

The KlickTipp actions require approval, but the CLI dependency can persistently install other agent skills without disclosure here.

Review the CLI's broader skill-installation behavior before using this skill. Prefer a verified CLI release and consider setting OO_SKILLS_SYNC_DISABLED=1 for every invocation, as described in the publisher documentation. OOMOL will process the contact data you submit. Confirm each contact change or unsubscribe. The remote installers and hosted service implementation remain unverified.

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
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied code installs software from an external source and shows no KlickTipp functionality or established dependency relationship. Although dependency installation can be a supporting implementation detail, nothing supplied connects this installer to the declared purpose. The remote script's contents and any additional effects cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command executes a remotely fetched, mutable script without verifying its integrity or reviewing its contents; the PowerShell alternative has the same weakness. Compromise of the distribution endpoint or release pipeline could execute arbitrary code with the invoking user's privileges and expose local credentials or files. Restricting installation to a missing-CLI error reduces exposure but does not make the fetched code trustworthy.

Content

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

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