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Security audit

X Post Details by Gecho

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed X post collection workflow that uses Gecho’s MCP and Chrome extension, with notable but purpose-aligned setup and data-saving risks.

Install only if you are comfortable using Gecho Bridge and its Chrome extension with your logged-in X session. Prefer reviewing or pinning the Gecho Bridge package version instead of using @latest, and save results only to a directory where raw collected X data is appropriate to store.

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
  • System Prompt LeakageDirect Leakage, Indirect Extraction, Tool-Based Exfiltration
  • 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
Findings (3)

Direct Prompt Extraction

High
Category
System Prompt Leakage
Confidence
85% confidence
Finding

Skill contains instructions that could directly expose system prompts, internal rules, or hidden instructions to users or external parties.

Content

Scanner excerpt · SKILL.md (reported line 285)May include surrounding context.

md
Join the [WeCom group](https://github.com/gecho-ai/gecho-bridge/blob/main/qywx.jpg) or use the [1:1 support QR code](https://github.com/gecho-ai/gecho-bridge/blob/main/wx.jpg).

## Output guidelines

For success:
- Say the tool completed.

Rp1

Medium
Category
MCP Rug Pull
Confidence
91% confidence
Finding

The skill instructs users to launch an MCP server via npx ...@latest, which fetches and executes the newest package version at runtime without pinning or integrity controls. That creates a supply-chain risk: a compromised upstream package or malicious update could gain code execution in the local environment where the MCP server runs.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
86% confidence
Finding

The skill states that it may save structured and raw X data and later allows a user-provided save_dir, but it does not prominently warn that local files will be written or that raw results may contain more data than the chat summary. This can lead to unintended local persistence of scraped content in sensitive directories or shared workspaces.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.