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Security audit

Longform Blog Writer

Security checks for vulnerabilities and agentic risk

Overview

This is a coherent blog-writing skill with disclosed formatting, citation, and companion-skill behavior, and I found no hidden unsafe actions.

Install this if you want a structured blog-writing assistant. Review factual claims before publishing, and be aware that complex concepts may be routed to the disclosed Concept Decoder companion skill.

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
  • 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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (7)

Hidden Instructions

High
Category
Prompt Injection
Confidence
70% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 138)May include surrounding context.

md
## Category-Specific Templates

<!-- [I-01 FIX] Category order aligned with README:
     论文解读 → 科学研究 → 编程技术 → 数学概念 → 思维方法 → 书评 → 科普 -->

---

Hidden Instructions

High
Category
Prompt Injection
Confidence
70% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 347)May include surrounding context.

md
- Incremental formula build-up with ⚡ marking the critical step
- Plain-language interpretation after every display equation

<!-- [I-05 FIX] Added category-specific math formatting block, consistent with README -->
**Math Formatting Rules (this category):**
- Display equations: `$$...$$`, centered; number them if cross-referenced
- Inline math: `$...$`

Hidden Instructions

High
Category
Prompt Injection
Confidence
70% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 622)May include surrounding context.

md
- Response: List the interpretations; ask which angle to take; offer to cover all with clear section separation

### Category cannot be inferred · 无法推断类别
<!-- [I-11 FIX] Added A/B/C/D prompt template, consistent with README -->
- Ask the user:
  > "这篇文章的目标读者是谁?
  > A) 专业研究者 / B) 开发者 / C) 大众读者 / D) 学生"

Hidden Instructions

High
Category
Prompt Injection
Confidence
70% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 622)May include surrounding context.

md
- Response: List the interpretations; ask which angle to take; offer to cover all with clear section separation

### Category cannot be inferred · 无法推断类别
<!-- [I-11 FIX] Added A/B/C/D prompt template, consistent with README -->
- Ask the user:
  > "这篇文章的目标读者是谁?
  > A) 专业研究者 / B) 开发者 / C) 大众读者 / D) 学生"

Hidden Instructions

High
Category
Prompt Injection
Confidence
70% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 669)May include surrounding context.

md
- Anti-pattern examples clearly labeled with `# ❌ Anti-pattern` comment

### Lists
<!-- [I-15 FIX] Added nesting depth limit, consistent with README -->
- Use bullet lists for unordered items (features, options)
- Use numbered lists for sequential steps or ranked items
- **Do not nest lists deeper than 2 levels**

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill hard-codes a language fallback for mixed-language input to Chinese without explicitly confirming the user's preference. This can cause unintended behavior, miscommunication, or subtle prompt steering, especially for multilingual users who expected English or another language; however, it is not a direct security exploit primitive.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
79% confidence
Finding

The README specifies that science communication writing should target a "curious 16-year-old" reader. This is a natural-language constraint on audience/age framing that could force a particular communication standard without asking the user whether they want that locale/reading-level convention.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.