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Security audit

Study Planner

Security checks for vulnerabilities and agentic risk

Overview

This is a study-planning helper that runs a small local schedule calculator and does not request sensitive access, persistence, or network activity.

Installers should expect a bilingual study-planning skill that may produce Chinese phase names or templates unless the agent adapts the output. It appears proportionate for learning-plan generation and does not show hidden network access, persistence, credential handling, or destructive actions.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • 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 (4)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The manifest description says the skill is for "any subject or skill" and lists broad trigger phrases such as "study plan", "learning schedule", "how to learn X", and "prepare for exam". These phrases are common user utterances and the file does not provide exclusion conditions or clearer activation boundaries, increasing the chance of unintended invocation.

Content

No source excerpt is available for this finding.

Behavior Manipulation

Medium
Category
Prompt Injection
Confidence
70% confidence
Finding

Subtle instructions detected that may alter agent decision-making or introduce hidden biases.

Content

Scanner excerpt · SKILL.md (reported line 87)May include surrounding context.

md
## Key Principles

- **Active > Passive**: Always recommend practice over reading
- **Small wins**: Break goals into daily achievable chunks
- **Energy matching**: Hard tasks in peak hours, review in low hours
- **Flexibility**: Plans must bend — include buffer days (10-15% of total)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The generated schedule hard-codes Chinese natural-language labels for all study phases, which imposes a specific language on users regardless of their preferences. This is a natural-language policy concern because the file provides no opt-in, fallback, or explanation that the skill is intended only for Chinese-speaking users.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
93% confidence
Finding

This markdown file presents all instructional content in Chinese and does not indicate that the user can choose another language. Under the policy, forcing a specific language without user opt-in is a natural-language policy concern unless the locale restriction is clearly documented and justified.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.