Security audit

WebScraper.io

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for managing WebScraper.io through OOMOL, but its fallback setup tells agents to execute mutable remote installer scripts directly in a shell.

Review this skill before installing if you do not already trust OOMOL's installer path. Prefer installing the oo CLI through a verified, versioned, user-controlled process, and only allow write or delete WebScraper.io actions after checking the exact target and payload.

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:65
Finding: Unverified Remote Installation Scripts Executed Directly by Shells
Content: View full analysis
Remediation: View remediation

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: 98% confidence
Finding: The skill instructs the agent to install software by piping a remotely fetched script directly into a shell, which creates a classic remote code execution path if the hosting domain, TLS chain, CDN, or script contents are compromised. Because this appears in a 'first-time setup' section of an operational skill, an agent may follow it during error recovery, making the dangerous pattern reachable in normal use.
Content: Scanner excerpt · SKILL.md (reported line 65)May include surrounding context.

oo: command not found — install the oo CLI (other platforms: https://cli.oomol.com/install-guide.md):

bash
curl -fsSL https://cli.oomol.com/install.sh | bash # macOS / Linux

powershell

Vague Triggers

Medium

Category: Not specified by scanner
Confidence: 95% confidence
Finding: The description defines activation in extremely broad terms without narrowing context, exclusions, or example trigger boundaries. Because SKILL.md is a markdown file, this falls under vague triggers and could cause unintended invocation whenever WebScraper.io is merely mentioned.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.