Security audit

Uppercase Converter

Security checks for vulnerabilities and agentic risk

Overview

This skill is a simple uppercase converter with only a minor caution around user-requested file rewrites.

Before asking it to write back to an existing file, make sure you want that file changed; otherwise use the stdout result or write to a new file.

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)

Medium

Category: Not specified by scanner
Confidence: 95% confidence
Finding: The skill explicitly instructs the agent to write converted output back to a user-referenced file, but it does not require confirmation, warn about overwriting data, or recommend creating a separate output file. In an automated agent context, this can cause unintended modification or destruction of user data, especially if the agent misidentifies the target file or performs in-place replacement.
Content: No source excerpt is available for this finding.

No suspicious patterns detected.