ClawHub
Back to skill

Security audit

Excel Xlsx 1.0.2

Security checks for vulnerabilities and agentic risk

Overview

This Excel skill is a documentation-only workflow guide, and its spreadsheet-editing cautions fit its stated purpose.

Reasonable to install for Excel workbook tasks. Because spreadsheet edits can affect formulas and business logic, keep normal backups and review output workbooks, and only install related skills or run optional clawhub commands when you choose to.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (1)

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
75% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 89)May include surrounding context.

md
- Dynamic array or newer Excel functions like `FILTER`, `XLOOKUP`, `SORT`, or `SEQUENCE` may fail or degrade in older viewers.
- A workbook can look fine while still carrying stale cached values from a prior recalculation.
- Saving the wrong workbook view can replace formulas with cached values and quietly destroy a live model.
- Copying formulas without checking relative references can push one bad range across an entire block.
- Hidden sheets, named ranges, validations, and merged areas often keep business logic that is invisible in a quick skim.
- A workbook can appear numerically correct while still failing because filters, conditional formats, print settings, or data validation were stripped.
- A workbook can be numerically correct and still fail visually because wrapped text, clipped labels, or narrow columns were never reviewed.

Static analysis

No suspicious patterns detected.