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Security audit

PostQube Threads Publisher

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward PostQube/Threads publishing helper that discloses its external API use and requires user confirmation before posting.

Install only if you intend to use PostQube as a third-party posting service for Threads. Confirm each drafted post carefully, since successful requests may publish public social content and PostQube will receive the content and API authentication header.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (1)

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 68)May include surrounding context.

Single Post:

bash
curl -X POST https://postqube.quickbitsoftware.com/api/v1/post \
  -H "x-api-key: $POSTQUBE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{