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Security audit

Brand & Logo Fetch

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed, read-only helper for fetching public brand information from a domain.

Install only if you are comfortable sending public domain names to ReplyNodes for brand extraction. Do not use it with internal hosts, private URLs, tokens, credentials, or trademark/licensing decisions, and treat returned URLs and metadata as untrusted reference data.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (3)

Rp1

Medium
Category
MCP Rug Pull
Confidence
70% confidence
Finding

npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · README.md (reported line 90)May include surrounding context.

md
Brand & Logo Fetch is the free, zero-auth entry point of the ReplyNodes brand
capability. The same brand data is available with more operations (brand search,
fuller styleguides, typography-only extraction) through the authenticated
ReplyNodes API at `https://api.replynodes.com/v1/brand/*` and the production MCP
at `https://mcp.replynodes.com/mcp` — see
[docs.replynodes.com](https://docs.replynodes.com/docs/guides/brand-intelligence).

Vague Triggers

Low
Category
Not specified by scanner
Confidence
89% confidence
Finding

The example invocation "get brand identity from this domain" is broad and lacks constraints about what counts as a valid target or context. In a markdown skill description, this kind of generic phrasing can increase the chance of unintended invocation because it resembles ordinary user speech rather than a narrowly scoped command.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.