Security audit
Administer Mermail Workspace
Security checks for vulnerabilities and agentic risk
Overview
This skill is a disclosed Mermail workspace administration helper with high-impact admin abilities, but its instructions are scoped, approval-gated, and consistent with its purpose.
Install only if you intend to let the agent administer a Mermail workspace using your MERMAIL_API_KEY. Review proposed member, domain, mailbox, and webhook changes carefully before approval, especially webhook actions because they can send selected email content to an external destination.
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
Vulnerability Patterns
- 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
- Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep