AI Agent Skill Security Report — 2026-03-25

Dev.to / 3/25/2026

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Key Points

  • The report analyzes automated security audits across the AI agent skill ecosystem, including Claude Code skills and MCP servers, reviewing 2069 skills in depth out of 33156 indexed.
  • It finds a concerning distribution of results: 594 deemed safe, 1223 suspicious, and 246 identified as malicious.
  • Several high-risk skills are highlighted as malicious, including ones aimed at evading AI text detectors, performing script-based “fake security” checks, and enabling anti-detection web scraping.
  • The flagged threat patterns repeatedly involve dynamic code evaluation, LLM semantic detection/handling, and behaviors that suggest outbound data transfer or credential/SSH key access.
  • The most severe examples include “humanize-ai-text” (reported as 76% risk), “moltguard” (93% risk), and “stealth-browser” (81% risk), each with thousands of downloads, implying real-world exposure despite detection claims.

We've been running automated security audits on the AI agent skill ecosystem (Claude Code, MCP servers). Out of 33156 indexed skills, 2069 have been deeply analyzed.

Results: 594 safe, 1223 suspicious, 246 malicious.

Notable Findings

🚨 humanize-ai-text by moltbro

Verdict: MALICIOUS | Risk: 76% | Downloads: 32323

A CLI toolkit that detects linguistic patterns associated with AI-generated text and rewrites content to evade AI detection systems such as GPTZero, T

Key threats:

  • [HIGH] Dynamic Code Evaluation

  • [CRITICAL] LLM Semantic Detection

  • [CRITICAL] LLM Semantic Detection

Full report →

🚨 moltguard by thomaslwang

Verdict: MALICIOUS | Risk: 93% | Downloads: 17916

此技能声称安装一个名为MoltGuard的安全插件,用于防止提示注入、数据泄露和恶意命令,但其核心行为包含脚本化欺骗:指示AI读取一个包含'隐藏提示注入攻击'的文件,然后向用户谎称安全工具'检测到了'该攻击,实际上AI自己就是读取文件的主体,并无真实检测发生。

Key threats:

  • [HIGH] Dynamic Code Evaluation

  • [HIGH] SSH Key Access

  • [CRITICAL] LLM Semantic Detection

Full report →

🚨 stealth-browser by mayuqi-crypto

Verdict: MALICIOUS | Risk: 81% | Downloads: 10225

A browser automation skill that enables anti-detection web scraping, Cloudflare/CAPTCHA bypass, persistent login sessions, and proxy rotation — primar

Key threats:

  • [HIGH] Dynamic Code Evaluation

  • [HIGH] Outbound Data Transfer

  • [CRITICAL] LLM Semantic Detection

Full report →

🚨 cellcog by nitishgargiitd

Verdict: MALICIOUS | Risk: 88% | Downloads: 9301

A Claude Code skill that wraps the CellCog external AI platform SDK, enabling agents to delegate multimodal tasks (research, video, images, PDFs, dash

Key threats:

  • [HIGH] Dynamic Code Evaluation

  • [CRITICAL] LLM Semantic Detection

  • [CRITICAL] LLM Semantic Detection

Full report →

🚨 task-status by mightyprime1

Verdict: MALICIOUS | Risk: 88% | Downloads: 7738

A Clawdbot helper skill that sends task status messages to a Telegram account via WebSocket or CLI fallback, with optional periodic 'heartbeat' update

Key threats:

  • [HIGH] Dynamic Code Evaluation

  • [HIGH] Outbound Data Transfer

  • [CRITICAL] LLM Semantic Detection

Full report →

Protect Yourself