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Security audit

Monobank

Security checks for vulnerabilities and agentic risk

Overview

This skill is a narrowly scoped Monobank balance helper that uses a user-provided token only to call Monobank's own API and tells the agent not to store or expose sensitive values.

Only provide a Monobank API token when you intentionally want the agent to retrieve your balances. Review the response for masked account labels only, and avoid sharing the token in plain chat beyond the request that needs it.

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 (4)

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 20)May include surrounding context.

md
env: []
      bins: []
    endpoints:
      - https://api.monobank.ua/personal/client-info
---

# Monobank

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 40)May include surrounding context.

md
env: []
      bins: []
    endpoints:
      - https://api.monobank.ua/personal/client-info
---

# Monobank

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 48)May include surrounding context.

md
env: []
      bins: []
    endpoints:
      - https://api.monobank.ua/personal/client-info
---

# Monobank

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
95% confidence
Finding

The instructions require that balance answers "must be in Ukrainian by default," which imposes a specific language choice on users unless they explicitly request otherwise. This is a natural-language locale policy concern because the skill defaults to a fixed language rather than offering a neutral choice or opt-in.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.