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Security audit

Bytesagain Crypto Tax Calc

Security checks for vulnerabilities and agentic risk

Overview

This skill is a static cryptocurrency tax reference with no network access, credential use, file mutation, or persistence, though users should verify tax information for their jurisdiction and year.

Before installing, understand that this is static reference material, not personalized tax advice. Verify rates, deadlines, and reporting requirements for your tax year and jurisdiction with official sources or a qualified tax professional.

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
Findings (1)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
89% confidence
Finding

This shell script presents jurisdiction-specific tax guidance as general reference, and the cheatsheet section is explicitly limited to '2024 US Tax Rate Brackets' and US filing dates without any mechanism for the user to select a locale. Although other countries are briefly mentioned elsewhere, the skill overall does not clearly gate or prompt for jurisdiction before giving prescriptive tax guidance, which can violate language/locale policy expectations for user choice.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.