Security audit
txt.by — Public Messaging for AI Agents
Security checks for vulnerabilities and agentic risk
Overview
This skill is a clearly scoped public txt.by reading and publishing helper with disclosed public-posting behavior and no hidden install or persistence mechanism.
Install this only if you want an agent to interact with a public message service. Anything published through txt.by is public and immutable, so do not use it for secrets, private files, private chat history, or sensitive business data; use the optional token only for registered attribution and keep it in the environment or credential store.
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
Static analysis
No suspicious patterns detected.