ClawHub
Back to skill

Security audit

Resend

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for operating a Resend account, but its fallback setup tells the agent to execute a remote installer script directly, which deserves review before installation.

Review the oo CLI installer yourself before allowing the fallback setup command to run, and prefer a verified or package-manager install path if available. Once installed, use the skill only for intentional Resend account operations, and require explicit confirmation before sending emails, updating scheduled emails, or canceling scheduled emails.

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
  • 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
95% confidence
Finding

The skill instructs users to install software by piping a remote script directly into bash, which creates a supply-chain and remote code execution risk if the hosting endpoint, transport, or script contents are compromised. Because this appears in a fallback setup path inside an agent skill, an agent or user may execute it with little scrutiny, increasing the chance of unsafe execution.

Content

Scanner excerpt · SKILL.md (reported line 66)May include surrounding context.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The description says to use this skill for "ANY Resend request" and "Whenever a task involves Resend," which is a very broad activation condition for a markdown skill description. It does not provide negative examples or narrower constraints, so it could overlap with many ordinary requests that merely mention Resend and cause unintended invocation.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.