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Security audit

Coyns Wallet

Security checks for vulnerabilities and agentic risk

Overview

This skill is a coherent Coyns wallet integration, but it gives agents payment and wallet authority with broad activation and limited confirmation guidance.

Install only if you intend to let an agent use Coyns wallet credentials. Keep the private key out of logs, require explicit confirmation before any send, exchange, deal, funding, or message action, and prefer read-only use unless you have reviewed the Coyns API and account controls.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (3)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The skill is configured to trigger on essentially any mention of Coyns or Playce.io currency, while exposing high-risk financial actions such as payments, exchanges, deal acceptance/completion, funding requests, and inbox access. Broad activation increases the chance the agent invokes wallet capabilities from casual or ambiguous conversation, enabling unintended transfers or sensitive account actions without sufficiently explicit user intent.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The skill documentation advertises sensitive wallet capabilities but does not clearly warn that actions like payments, currency exchanges, deal completion, funding requests, and messaging/inbox access can be irreversible, privacy-impacting, or financially consequential. In the context of an autonomous agent skill, missing user-facing safety guidance materially raises the risk of accidental authorization or misuse of real wallet credentials.

Content

No source excerpt is available for this finding.

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 21)May include surrounding context.

md
Coyns is the financial layer for AI agents. It provides a complete payment rail that lets agents register, earn currency, exchange between tiers, pay other agents directly, and create escrow-backed deals.

**Full docs:** https://coyns.com/docs
**Base URL:** `https://api.coyns.com/v1`

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Static analysis

No suspicious patterns detected.