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Security audit

Poyo Claude 4 6 Api

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed PoYo Claude Messages API helper that sends only user-chosen payloads to the documented PoYo endpoint when explicitly requested.

Install only if you intend to use PoYo for Claude Messages API calls. Treat POYO_API_KEY and request payloads as sensitive, run the submit script only with payloads you are willing to send to PoYo, and avoid placing secrets or private data in examples, logs, browser code, or public repositories.

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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • 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 (11)

Hidden Instructions

High
Category
Prompt Injection
Confidence
60% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 1)May include surrounding context.

md
---
name: poyo-claude-4-6-api
description: Claude 4.6 Series Messages API on PoYo / poyo.ai via `https://api.poyo.ai/v1/messages`; use for `claude-sonnet-4-6`, `claude-opus-4-6`, Claude-compatible messages, tools, structured output, prompt cache settings, vision content blocks, streaming, and server-side integration.
metadata: {"openclaw":{"homepage":"https://poyo.ai/models/claude-4-6-api","requires":{"bins":["curl"],"env":["POYO_API_KEY"]},"primaryEnv":"POYO_API_KEY"}}

Credential Access

High
Category
Privilege Escalation
Confidence
70% confidence
Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · references/api.md (reported line 19)May include surrounding context.

Content-Type: application/json

text

Get API keys from <https://poyo.ai/dashboard/api-key>.

Recommended skill env var:

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 · references/api.md (reported line 56)May include surrounding context.

Basic Messages Example

bash
curl --fail-with-body --request POST \
  --url "https://api.poyo.ai/v1/messages" \
  --header "x-api-key: YOUR_API_KEY" \
  --header "anthropic-version: 2023-06-01" \

External Transmission

Medium
Category
Data Exfiltration
Confidence
70% 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 · scripts/submit_claude_4_6_messages.sh (reported line 13)May include surrounding context.

sh
payload_file="$1"

curl --fail-with-body --request POST \
  --url "https://api.poyo.ai/v1/messages" \
  --header "x-api-key: ${POYO_API_KEY}" \
  --header "anthropic-version: 2023-06-01" \

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

This code performs an HTTP POST to an external API and includes both user-supplied payload data and a credential in headers. There is no confirmation prompt, logging, comment, or docstring in the script warning the user that local file contents will be transmitted to a remote service.

Content

No source excerpt is available for this finding.

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 3)May include surrounding context.

md
payload_file="$1"

curl --fail-with-body --request POST \
  --url "https://api.poyo.ai/v1/messages" \
  --header "x-api-key: ${POYO_API_KEY}" \
  --header "anthropic-version: 2023-06-01" \
  --header "Content-Type: application/json" \

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 · references/api.md (reported line 5)May include surrounding context.

md
payload_file="$1"

curl --fail-with-body --request POST \
  --url "https://api.poyo.ai/v1/messages" \
  --header "x-api-key: ${POYO_API_KEY}" \
  --header "anthropic-version: 2023-06-01" \
  --header "Content-Type: application/json" \

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 · references/api.md (reported line 57)May include surrounding context.

md
payload_file="$1"

curl --fail-with-body --request POST \
  --url "https://api.poyo.ai/v1/messages" \
  --header "x-api-key: ${POYO_API_KEY}" \
  --header "anthropic-version: 2023-06-01" \
  --header "Content-Type: application/json" \

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 · references/api.md (reported line 78)May include surrounding context.

md
payload_file="$1"

curl --fail-with-body --request POST \
  --url "https://api.poyo.ai/v1/messages" \
  --header "x-api-key: ${POYO_API_KEY}" \
  --header "anthropic-version: 2023-06-01" \
  --header "Content-Type: application/json" \

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 · references/api.md (reported line 116)May include surrounding context.

md
payload_file="$1"

curl --fail-with-body --request POST \
  --url "https://api.poyo.ai/v1/messages" \
  --header "x-api-key: ${POYO_API_KEY}" \
  --header "anthropic-version: 2023-06-01" \
  --header "Content-Type: application/json" \

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 · scripts/submit_claude_4_6_messages.sh (reported line 14)May include surrounding context.

sh
payload_file="$1"

curl --fail-with-body --request POST \
  --url "https://api.poyo.ai/v1/messages" \
  --header "x-api-key: ${POYO_API_KEY}" \
  --header "anthropic-version: 2023-06-01" \
  --header "Content-Type: application/json" \