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Security audit

Web Learner

Security checks for vulnerabilities and agentic risk

Overview

This is a straightforward Chinese-language web research skill that tells the agent to search, fetch, and browse the web, with no evidence of hidden execution, persistence, credential theft, or destructive behavior.

Install this if you want a Chinese-first web research helper. Be aware that using it can send search terms, URLs, and task context to external websites or search providers, and its broad triggers may browse the web even when a local answer might have been enough.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (4)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The skill explicitly enables proactive searching, browsing, and fetching from the internet but does not warn that user prompts or derived search terms may be sent to third-party services. This creates a privacy and consent issue because users may unknowingly trigger external network access and data sharing with search engines, websites, or browser services.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The trigger conditions are broad enough to activate on many ordinary requests such as '了解', '学习', '查询', or '汇报', which can cause the skill to initiate network access when the user may only want a general answer from existing model knowledge. In a web-browsing skill, overbroad activation increases the chance of unintended external requests, unnecessary data exposure in queries, and surprising behavior outside user expectations.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The instructions require prioritizing Chinese search results with country set to CN and later state '用中文总结呈现' and '使用中文'. This forces a specific language/locale behavior without user opt-in or a documented region-specific justification, which is a natural-language policy violation under the stated rules.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
95% confidence
Finding

The document prescribes fixed search parameters country: "CN" and search_lang: "zh" as the default approach, which imposes a specific locale and language. There is no indication that users can choose another language/region or that this constraint is limited to a justified region-specific use case.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.