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Security audit

Transistor FM

Security checks for vulnerabilities and agentic risk

Overview

This skill is a legitimate Transistor.fm API helper, but it gives agents broad podcast-changing authority without enough guardrails around publishing, deletion, subscriber management, or API key handling.

Install only if you are comfortable letting the agent work with your Transistor.fm API key. Before using it for publishing, deletion, updates, or subscriber changes, require the agent to confirm the exact show, episode, subscriber, and action first, and avoid command forms that expose the API key in logs or process arguments.

A.I.G

Vulnerability Patterns
  • Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
  • 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
Findings (1)

T09 · Insecure Skill Coding Practices

Warning
Location
SKILL.md:24
Finding

Transistor.fm API Key Exposed Through Command-Line Arguments

Content
View full analysis
Remediation
View remediation

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 (4)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The trigger description is extremely broad and can activate on essentially any Transistor.fm-related task, including sensitive operations such as publishing or deleting episodes. Over-broad routing increases the chance the skill is invoked without sufficient user confirmation or context, which can lead to unintended destructive or externally transmitted actions.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
90% confidence
Finding

The skill advertises podcast management capabilities including deletion but does not warn that some actions are destructive and potentially irreversible. In an agentic context, missing warnings reduce friction around high-impact operations and make accidental deletion or unauthorized changes more likely.

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 17)May include surrounding context.

md
## Quick Reference

All requests use base URL `https://api.transistor.fm/v1` with header `x-api-key: <key>`.
Rate limit: 10 requests per 10 seconds.

For full endpoint details, parameters, and response formats, see [references/api.md](references/api.md).

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 28)May include surrounding context.

bash
# Get all shows
curl -s "$BASE/shows" -H "x-api-key: $KEY"

# Get episodes for a show
curl -s "$BASE/episodes?show_id=SHOW_ID" -H "x-api-key: $KEY"

Static analysis

No suspicious patterns detected.