Back to skill

Security audit

SaaS订阅用量与超额计费核对(免费版)

Security checks for vulnerabilities and agentic risk

Overview

This skill is a local SaaS billing-table checker whose file access and local script execution are disclosed and proportionate to its purpose.

Install only if you are comfortable running a local Node.js script on billing spreadsheets or pasted billing-table text. The tool is mainly Chinese-language and checks only the free-version items it lists; it does not validate contract terms, true usage-metering policy, invoices, payments, or other withheld checks.

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
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • 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 (8)

Ae1

High
Category
analysis-evasion
Content
node scripts/run.mjs --sample # 先看样例
Confidence
100% confidence
Finding
Referenced artifact was not completely inspected

Ae1

High
Category
analysis-evasion
Content
node scripts/run.mjs --sample # 先看样例
Confidence
100% confidence
Finding
Referenced artifact was not completely inspected

Ae1

High
Category
analysis-evasion
Content
node scripts/run.mjs --sample # 先看样例
Confidence
100% confidence
Finding
Referenced artifact was not completely inspected

Natural-Language Policy Violations

Medium
Confidence
81% confidence
Finding
The primary display name, summary, and most of the skill instructions are presented only in Chinese, while the file includes an English display name and description but does not indicate that users may choose their preferred language. This creates a natural-language locale constraint without explicit opt-in or a documented region-specific justification.

Natural-Language Policy Violations

Medium
Confidence
97% confidence
Finding
This JavaScript file contains extensive natural-language instructions, warnings, and output strings entirely in Chinese, including the top-level description and operational guidance. Because the skill does not offer any user opt-in or locale selection, it imposes a specific language on all users, which matches the language/locale policy violation criteria.

Natural-Language Policy Violations

Medium
Confidence
95% confidence
Finding
The file's descriptive comments, usage text, error messages, and normal output are all written in Chinese, with no indication that another language is available or that the locale is intentionally constrained. This is a natural-language policy concern because it imposes a specific language on users without opt-in or documented justification.

Natural-Language Policy Violations

Medium
Confidence
89% confidence
Finding
The JSON payload contains only Chinese headers, values, and notes, indicating a fixed language/locale presentation. Because this file provides no opt-in, alternative locale, or justification for being China-specific, it conflicts with the policy against forcing a specific language without user choice.

Intent-Code Divergence

Low
Confidence
85% confidence
Finding
The inline comment says non-JSON input is treated as plain-text material such as '直接粘贴的合同全文', which contradicts the rest of the script and manifest that require a subscription usage/overage detail table with headers. The implementation passes such text to the billing-check engine, so the documentation suggests a broader accepted document type than the skill's stated purpose.

Static analysis

No suspicious patterns detected.