Security audit

Uptime Checker

Security checks for vulnerabilities and agentic risk

Overview

This uptime-checking skill does what it claims, but its documented Authorization-header support can expose sensitive tokens through command-line use and default redirect handling.

Install only if you are comfortable with it making outbound requests to URLs you provide. Avoid passing real bearer tokens, cookies, or API keys in --header unless you trust the endpoint and redirects; prefer disabling redirects or using non-sensitive health-check credentials. Store history files in a deliberate location because they may retain endpoint URLs, statuses, timings, and errors.

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: scripts/uptime_check.py:34
Finding: Sensitive Custom Headers May Be Disclosed Through Cross-Origin Redirects
Content: View full analysis
Remediation: View remediation

SkillSpector

Vulnerability Patterns

Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
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)

Undeclared Tool Scope

Medium

Category: MCP Least Privilege
Confidence: 91% confidence
Finding: The skill advertises and documents capabilities that perform network access and local file writes, but it does not declare any corresponding tool scope or permissions boundary. This is dangerous because users and hosting systems cannot easily understand or constrain what the skill is allowed to do, increasing the chance of unintended outbound requests or file modifications when the skill is invoked.
Content: No source excerpt is available for this finding.

Missing User Warnings

Medium

Category: Not specified by scanner
Confidence: 90% confidence
Finding: The documentation encourages passing an Authorization header directly on the command line without warning that secrets may be exposed to shell history, process listings, logs, or sent to arbitrary external endpoints. In an uptime-checking context, this is particularly risky because the skill is designed to make outbound requests, so misuse could easily leak bearer tokens to the wrong destination.
Content: No source excerpt is available for this finding.

Missing User Warnings

Low

Category: Not specified by scanner
Confidence: 80% confidence
Finding: The skill documents saving history to a local file but does not warn that files will be created or potentially overwritten. While this appears intended functionality rather than malicious behavior, it can still cause accidental data loss or unexpected persistence of endpoint metadata on disk.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.