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Security audit

mar-email-send

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward email-sending helper, but users should understand that email contents and recipient details are sent through SkillBoss/HeyBossAI's external API.

Install only if you are comfortable using SkillBoss/HeyBossAI as the email processor. Treat recipient lists, CC/BCC, subject lines, and body_html as data sent outside your local environment, and avoid sensitive or regulated content unless your organization approves that provider and API key use.

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 (3)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
98% confidence
Finding

The skill sends email content, recipient addresses, and optional CC/BCC data to a third-party API, but the documentation does not clearly warn users that this information leaves the local environment. This creates a privacy and data-handling risk because operators may use the skill with sensitive message contents or recipient metadata without informed consent or approval.

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 26)May include surrounding context.

md
import requests, os

SKILLBOSS_API_KEY = os.environ["SKILLBOSS_API_KEY"]
API_BASE = "https://api.heybossai.com/v1"

def pilot(body: dict) -> dict:
    r = requests.post(

External Transmission

Medium
Category
Data Exfiltration
Confidence
93% confidence
Finding

This code performs an outbound HTTPS POST to a third-party API and includes user-supplied email content and recipient data in the JSON body. While external transmission is the intended function of an email-sending skill, it is still security-relevant because sensitive business or personal data could be exfiltrated to an external processor if the user is not adequately informed or if the skill is used in restricted environments.

Content

Scanner excerpt · SKILL.md (reported line 29)May include surrounding context.

md
API_BASE = "https://api.heybossai.com/v1"

def pilot(body: dict) -> dict:
    r = requests.post(
        f"{API_BASE}/pilot",
        headers={"Authorization": f"Bearer {SKILLBOSS_API_KEY}", "Content-Type": "application/json"},
        json=body,

Static analysis

No suspicious patterns detected.