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Security audit

PowPow CLI — PowPow 技能共享执行层:登录/发帖/建数字人/删帖(写操作默认预览,--confirm 才执行)

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed PowPow command-line helper whose login, posting, deletion, upload, and verification behavior matches its stated purpose and includes confirmation gates for writes.

Install only if you trust PowPow with your account session and understand that confirmed actions can publish public posts, upload images, create public digital humans that cost badges, or irreversibly delete your own posts. Use the dry-run previews first, add --confirm only after reviewing the output, and run logout on shared machines.

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
  • Tool MisuseTool Parameter Abuse, Chaining Abuse, Unsafe Defaults
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (34)

Tp4

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
96% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
90% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
95% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Tp4

High
Category
MCP Tool Poisoning
Confidence
88% confidence
Finding

The skill contains standalone read/verification behavior not reflected in the concise declared purpose. While not inherently malicious, undocumented verification endpoints and read-side API calls still matter in a security review because they can leak identifiers, confirm resource existence, or create unanticipated audit traffic.

Content

No source excerpt is available for this finding.

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 41)May include surrounding context.

md
node scripts/geocode.js "<地名>" [--city <城市>] [--limit N] [--json]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 42)May include surrounding context.

md
node scripts/list-digital-humans.js [关键词] [--all] [--limit N] [--json]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 43)May include surrounding context.

md
node scripts/match-digital-human.js <topic> [--limit N] [--json]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 44)May include surrounding context.

md
node scripts/search-image.js <query | unsplash-photo-page-url>

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 45)May include surrounding context.

md
node scripts/verify.js <post-id>

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 51)May include surrounding context.

md
node scripts/compose.js --text-file <path> [--dh <id|name:<名>|auto>] [--topic "<topic>"] \

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 61)May include surrounding context.

md
node scripts/create-digital-human.js --name ... --desc ... --lng x --lat y --avatar ... --confirm

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 63)May include surrounding context.

md
node scripts/delete-post.js <post-id> # 拉取帖子摘要,exit 3

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 64)May include surrounding context.

md
node scripts/delete-post.js <post-id> # 拉取帖子摘要,exit 3

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 66)May include surrounding context.

md
node scripts/upload-image.js <local-image-path> # 只打印上传计划,exit 3

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 67)May include surrounding context.

md
node scripts/upload-image.js <local-image-path> # 只打印上传计划,exit 3

Tool Parameter Abuse

High
Category
Tool Misuse
Confidence
90% confidence
Finding

Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).

Content

Scanner excerpt · scripts/delete-post.js (reported line 2)May include surrounding context.

js
/**
 * Delete one of your own posts (DELETE /api/posts/[id], JWT-scoped).
 * Useful for cleaning up test posts. You can only delete your own posts.
 *
 * CONFIRMATION GATE: without --confirm this only FETCHES the post and prints

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
87% confidence
Finding

The skill declares network- and environment-using behavior but does not specify any explicit tool scope such as allowed-tools or permissions. In an agent setting, that omission weakens least-privilege guarantees and can let downstream orchestrators grant broader access than intended, especially since the skill handles authentication, local session state, and remote API interaction.

Content

No source excerpt is available for this finding.

Static analysis

Detected: suspicious.env_credential_access, suspicious.potential_exfiltration

Environment variable access combined with network send.

Critical
Code
suspicious.env_credential_access
Location
scripts/doctor.js:75

Environment variable access combined with network send.

Critical
Code
suspicious.env_credential_access
Location
scripts/search-image.js:95

Sensitive-looking file read is paired with a network send.

Warn
Code
suspicious.potential_exfiltration
Location
scripts/lib/api-client.js:86