Back to skill

Security audit

FastClaw Deployer

Security checks for vulnerabilities and agentic risk

Overview

The skill appears to be a deployment helper, but its artifacts do not clearly define or constrain deployment actions and give an overbroad safety assurance.

Review this skill carefully before installing. It may be harmless as a text-only deployment guide, but the package does not clearly say what deployment actions it can take, what systems it may touch, or what confirmations are required before changing a server.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (7)

Intent-Code Divergence

High
Category
Not specified by scanner
Confidence
96% confidence
Finding

Claiming rapid deployment to servers across Linux/macOS/Windows conflicts with the later assertion that the skill only performs text processing. This inconsistency can mislead users into trusting a skill that may in practice perform privileged automation, creating risk of unauthorized system changes or unsafe execution paths.

Content

No source excerpt is available for this finding.

Intent-Code Divergence

High
Category
Not specified by scanner
Confidence
98% confidence
Finding

The skill markets itself as a cross-platform server deployment tool, yet the security statement asserts it performs no system command execution and only text processing/API calls. That contradiction is dangerous because it can conceal the real operational scope of the skill, preventing users or reviewers from applying appropriate scrutiny to actions that may modify hosts, execute installers, or change deployment state.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The natural-language instructions and safety statement are presented only in Chinese, which effectively imposes a specific language on users. The file does not indicate that Chinese is optional, nor does it justify a locale-specific constraint.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The trigger condition activates on any message that merely contains the string "fastclaw-deployer", which makes unintended invocation likely in normal conversation, logs, quotes, or security discussions. Overly broad activation can cause the skill to run out of context and increases the attack surface for prompt-triggering or accidental execution.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

A skill presented as capable of deploying software to servers does not warn users that it may alter system state, install software, or affect production environments. In deployment contexts, absence of prominent warnings and consent boundaries makes misuse or accidental impact more likely, especially if users assume it is harmless text assistance.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The trigger condition is broad enough that ordinary messages containing related words could invoke a deployment-oriented skill unintentionally. In the context of infrastructure automation, ambiguous activation increases the chance of accidental execution, confusing context selection, or unsafe action initiation without clear user intent.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
75% confidence
Finding

The natural-language content is entirely in Chinese, with no indication that users may choose another language or locale. If organizational policy requires language neutrality or user opt-in for locale, this would be a policy violation because the skill presents a fixed language by default.

Content

No source excerpt is available for this finding.