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Security audit

instagram-followers-scraper

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Apify-based Instagram follower scraper with explicit billing approval steps and no hidden persistence or local execution payload.

Before installing, understand that this uses a paid Apify service: requested Instagram usernames will be sent to Apify, APIFY_TOKEN must be available to the agent, and the linked Apify account can be billed only after explicit approval of the charge cap.

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 (2)

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% 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 59)May include surrounding context.

md
## Verify pricing and set the cap

Fetch `https://api.apify.com/v2/acts/TESQ47dR6CqaVdLh8`. Select the latest
active entry in `.data.pricingInfos`, then read:

- `minimalMaxTotalChargeUsd`;

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% 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 98)May include surrounding context.

md
## Verify pricing and set the cap

Fetch `https://api.apify.com/v2/acts/TESQ47dR6CqaVdLh8`. Select the latest
active entry in `.data.pricingInfos`, then read:

- `minimalMaxTotalChargeUsd`;

Static analysis

No suspicious patterns detected.