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Security audit

URL to Markdown

Security checks for vulnerabilities and agentic risk

Overview

This skill is a small read-only helper that converts public web pages to Markdown through a disclosed third-party endpoint.

Install only if you are comfortable sending public URLs to the ReplyNodes Markdown service. Do not use it for private pages, tokenized links, intranet/local addresses, login-required content, or URLs containing credentials or secrets.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

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 33)May include surrounding context.

md
This skill reads public URLs only; it does not log in, submit forms, mutate websites, publish content, schedule work, or call social/provider write APIs.

No API key, account, credential, MCP server, paid ReplyNodes plan, or hidden telemetry is required. Never ask the user for credentials for this workflow.

If the URL is unsupported, malformed, unreachable, blocked, or exceeds the service's limits, report a concise bounded failure with the original URL and the service error/status when available. Do not retry indefinitely, bypass a site restriction, or fall back to private access.

Unbounded Resource Access

Medium
Category
Excessive Agency
Confidence
75% confidence
Finding

Skill allows unbounded resource consumption (API calls, storage, compute). Without rate limits or quotas, a compromised or misbehaving agent can cause denial-of-service or cost overruns.

Content

Scanner excerpt · SKILL.md (reported line 35)May include surrounding context.

md
No API key, account, credential, MCP server, paid ReplyNodes plan, or hidden telemetry is required. Never ask the user for credentials for this workflow.

If the URL is unsupported, malformed, unreachable, blocked, or exceeds the service's limits, report a concise bounded failure with the original URL and the service error/status when available. Do not retry indefinitely, bypass a site restriction, or fall back to private access.

If extraction is partial, label it partial and return only the content received; never invent missing text or claim that JavaScript/private content was read.

Static analysis

No suspicious patterns detected.