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Security audit

Linkhut

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for managing Linkhut bookmarks, but its setup instructions include unverified remote scripts executed directly by the shell.

Install only if you are comfortable using OOMOL's oo CLI with your Linkhut account. Avoid running the pipe-to-shell installer blindly; prefer an official package or a downloaded installer you can verify, and require confirmation before any create, update, or delete bookmark action.

A.I.G

Vulnerability Patterns
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • 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
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Findings (1)

T03 · Remote Payload Retrieval and Execution

Error
Location
SKILL.md:59
Finding

Mutable Remote Installation Scripts Executed Directly by Shells

Content
View full analysis
Remediation
View remediation
" echo " oo-installer.sh" | sha256sum -c - bash oo-installer.sh ``` The equivalent Windows workflow should download to a file, validate an Authenticode signature or published hash, and invoke the verified file without `Invoke-Expression`. ]]>

SkillSpector

Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (2)

External Script Fetching

High
Category
Supply Chain
Confidence
97% confidence
Finding

The skill instructs the agent/user to install software via curl ... | bash, which executes a remotely fetched script without prior verification. If the install endpoint, network path, or hosting is compromised, this can lead to arbitrary code execution on the local system running the command.

Content

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

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The phrase "Use this skill for ANY Linkhut request" is extremely broad and could match many ordinary mentions of Linkhut without clarifying boundaries or exclusions. The description does not provide narrower trigger conditions, examples, or negative examples to distinguish when this skill should or should not activate.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.