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Security audit

Operate Web Apps Built by Forguncy (aka 活字格)

Security checks for vulnerabilities and agentic risk

Overview

The skill is a disclosed helper for reading Forguncy table data, with no hidden execution or persistence, but it should only be used on tables the user is authorized to access.

Before installing, consider that this skill can bulk-read table contents from an authenticated Forguncy page. Use it only for tables you are allowed to access, avoid exporting more rows or columns than needed, and review extracted data before sharing it elsewhere.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • 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)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
89% confidence
Finding

The skill explicitly provides a ready-made browser-context script to extract the full contents of a Forguncy/SpreadJS table as CSV, but it includes no guardrails around data sensitivity, authorization, or user consent. In an agent setting, this lowers the barrier to bulk exfiltration of potentially sensitive business or personal data from authenticated web sessions, especially because the table name can be discovered dynamically in the same skill.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.