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Security audit

varg-character-big-guy

Security checks for vulnerabilities and agentic risk

Overview

ClawScan rated this skill benign with medium confidence: the scanners found no AIG issues and judged its purpose and privilege profile acceptable, while noting an unpinned install command and a possible disclosure gap.

Consider whether you are comfortable using an install command that does not pin the `skills` package version, and avoid including sensitive or identifying character details if they may be sent to an external generation service. The scan was partial: it inspected the two reported Markdown components, but a local reference in SKILL.md could not be resolved, so the evidence is incomplete.

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • 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)

MCP server referenced without pinned version: 'npx skills'.

Medium
Category
MCP Rug Pull
Confidence
90% confidence
Finding

The installation command runs an unpinned skills package through npx, allowing the resolved package version to change over time. A compromised future release could execute code with the installing user's permissions; this is a dependency supply-chain risk, although the finding incorrectly describes the installer as an MCP server.

Content

No source excerpt is available for this finding.

The character-sheet generation workflow lacks a warning that submitted character descriptions are sent to an external service.

Medium
Category
Output Handling
Confidence
88% confidence
Finding

This step instructs the agent to generate a model sheet using Seedream through the varg workflow, rather than merely listing an available model. Although the file identifies the varg connection, it does not warn users that character details incorporated from their requests will be transmitted to an external generation service.

Content

No source excerpt is available for this finding.