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Security audit

bilibili-hot

Security checks for vulnerabilities and agentic risk

Overview

This skill coherently fetches public Bilibili ranking data and saves it locally, with no evidence of hidden credential use, exfiltration, persistence, or destructive behavior.

Install this only if you are comfortable with it contacting Bilibili's API when invoked and creating or overwriting workspace/scripts/bilibili-hot.json and workspace/scripts/bilibili-hot.txt with public ranking results. It does not appear to request credentials or modify system settings.

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
  • 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
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (6)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
80% confidence
Finding

The skill declares no explicit tool scope or permission boundary even though the analyzer detected environment-related capabilities. In an agent ecosystem, missing scope declarations can lead to overbroad execution context and make it harder for users or orchestrators to enforce least privilege.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
90% confidence
Finding

The skill states that it will save results to local files but does not warn the user that files will be created or potentially overwritten. Silent filesystem writes are risky in agent settings because they can alter workspace state unexpectedly, destroy existing data, or leave sensitive output behind without user awareness.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 72)May include surrounding context.

md
const OUTPUT_DIR = path.join(WORKSPACE, 'scripts');

// B站全站排行榜API
const BILI_RANK_API = 'https://api.bilibili.com/x/web-interface/ranking/v2?rid=0&type=all';

async function fetchBilibiliRank() {
  return new Promise((resolve, reject) => {

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · bilibili-hot.js (reported line 15)May include surrounding context.

js
const OUTPUT_DIR = path.join(WORKSPACE, 'scripts');

// B站全站排行榜API
const BILI_RANK_API = 'https://api.bilibili.com/x/web-interface/ranking/v2?rid=0&type=all';

async function fetchBilibiliRank() {
  return new Promise((resolve, reject) => {

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill description says it fetches Bilibili ranking data, but the code also writes that data into workspace files as JSON and text. This is a real behavior mismatch that can surprise a caller or downstream agent, because filesystem persistence creates side effects beyond simple retrieval and may expose fetched content to other tools or later steps.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
78% confidence
Finding

The skill documents that it contacts a remote API but does not provide a user-facing network/privacy warning. Even if the API is official and public, outbound requests can disclose usage patterns, IP information, headers, and timing metadata to the remote service.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.