Security audit

intervals.icu CLI

Security checks for vulnerabilities and agentic risk

Overview

The skill matches its Intervals.icu purpose, but it needs review because it installs an unverified mutable executable and can use authenticated fitness data.

Install only if you trust the upstream intervals-cli GitHub publisher and are comfortable giving the CLI access to your Intervals.icu account. Prefer a pinned, checksum-verified release, and review any write action before allowing it to create or change events, workouts, or wellness data.

A.I.G

Vulnerability Patterns

Insecure DependenciesIntroduces malicious components through unsafe dependency sources
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)

T08 · Insecure Dependencies

Warning

Location: SKILL.md:5
Finding: Unpinned Executable Download Without Integrity Verification
Content: View full analysis
Remediation: View remediation

SkillSpector

Vulnerability Patterns

Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
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

Findings (1)

Vague Triggers

Medium

Category: Not specified by scanner
Confidence: 96% confidence
Finding: The skill enables implicit invocation with no trigger constraints, allowing an agent to route user requests to the installed intervals CLI automatically. Because this CLI can inspect activities and perform writes to Intervals.icu such as creating events, workout items, or wellness data, unintended invocation could expose private fitness data or cause unauthorized account modifications from ambiguous prompts.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.