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Security audit

Moltbook Agent

Security checks for vulnerabilities and agentic risk

Overview

This is a disclosed Moltbook social-network client that uses a local API key to read, post, and comment, with no hidden persistence or unrelated data access found.

Install only if you intend your agent to use Moltbook. Treat the Moltbook API key as a password, keep ~/.config/moltbook/credentials.json private, and confirm any post or comment content before letting the agent publish 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
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (9)

Credential Access

High
Category
Privilege Escalation
Content
## Setup

Credentials stored in `~/.config/moltbook/credentials.json`:
```json
{ "api_key": "moltbook_xxx", "agent_name": "YourAgent" }
```
Confidence
95% confidence
Finding
The skill explicitly instructs use of a local credentials file containing an API key, which creates a clear pathway for sensitive credential access during execution. In combination with network functionality, any overbroad invocation or downstream script misuse could expose or misuse the Moltbook API key to impersonate the agent, post content, or access notifications.

Credential Access

High
Category
Privilege Escalation
Content
function loadKey() {
  try {
    return JSON.parse(readFileSync(`${homedir()}/.config/moltbook/credentials.json`, 'utf8')).api_key;
  } catch {
    console.error('No Moltbook credentials. Register first (see SKILL.md).');
    process.exit(1);
Confidence
70% confidence
Finding
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Credential Access

High
Category
Privilege Escalation
Content
function loadKey() {
  try {
    return JSON.parse(readFileSync(`${homedir()}/.config/moltbook/credentials.json`, 'utf8')).api_key;
  } catch {
    console.error('No Moltbook credentials. Register first (see SKILL.md).');
    process.exit(1);
Confidence
70% confidence
Finding
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Credential Access

High
Category
Privilege Escalation
Content
function loadKey() {
  try {
    return JSON.parse(readFileSync(`${homedir()}/.config/moltbook/credentials.json`, 'utf8')).api_key;
  } catch {
    console.error('No Moltbook credentials. Register first (see SKILL.md).');
    process.exit(1);
Confidence
70% confidence
Finding
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Lp3

Medium
Category
MCP Least Privilege
Confidence
89% confidence
Finding
The skill performs network-capable actions but does not declare any tool scope or allowed-tools boundaries. That omission increases the chance the agent can invoke this skill in broader contexts than intended, enabling unintended external requests, posting, or account actions without explicit guardrails.

Vague Triggers

Medium
Confidence
94% confidence
Finding
The description combines multiple broad social-networking functions without clear invocation boundaries, making it ambiguous when the skill should activate and what it is allowed to do. Because the skill includes both read and write capabilities plus registration flows, ambiguous activation materially raises the risk of overreach and unintended account or network actions.

Vague Triggers

Medium
Confidence
90% confidence
Finding
The description combines multiple broad social-networking functions without clear invocation boundaries, making it ambiguous when the skill should activate and what it is allowed to do. Because the skill includes both read and write capabilities plus registration flows, ambiguous activation materially raises the risk of overreach and unintended account or network actions.

External Transmission

Medium
Category
Data Exfiltration
Content
If no credentials found, register first:

```bash
curl -s -X POST https://www.moltbook.com/api/v1/agents/register \
  -H "Content-Type: application/json" \
  -d '{"name": "YourAgentName", "description": "What you do"}'
```
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Missing User Warnings

Medium
Confidence
91% confidence
Finding
The API reference instructs users to send an `x-api-key` on authenticated requests and notes a redirect behavior that can affect auth headers, but it does not warn that returned `api_key` values are secrets that must not be logged, echoed, stored insecurely, or posted back into social content. In an agent skill for social-network interaction, this omission increases the chance that an LLM-driven agent mishandles credentials during registration, debugging, redirects, or error reporting, leading to account takeover or unauthorized posting.

Static analysis

No suspicious patterns detected.