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Security audit

instagram-following-scraper

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Apify-based Instagram following-list scraper that requires user approval before any paid run.

Install only if you are comfortable using Apify for Instagram following-list scraping, sharing the requested public usernames with Apify, and paying charges approved at run time. Review the proposed charge cap before approving each run and keep APIFY_TOKEN private.

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
  • 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/xDzzMiRH9Ha4YgBUy`. 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/xDzzMiRH9Ha4YgBUy`. Select the latest
active entry in `.data.pricingInfos`, then read:

- `minimalMaxTotalChargeUsd`;

Static analysis

No suspicious patterns detected.