Security audit

Exercise Form

Security checks for vulnerabilities and agentic risk

Overview

This is a simple local exercise helper with a disclosed local data directory and no evidence of hidden commands, network access, credential use, or unsafe persistence.

Installing this should have low security impact, but users should know it creates a local data directory and appears to provide generic exercise text rather than validated medical or coaching advice.

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

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
Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep

Findings (1)

Whitespace Padding

Medium

Category: Prompt Injection
Confidence: 80% confidence
Finding: Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
Content: Scanner excerpt · scripts/script.sh (reported line 9)May include surrounding context.
sh
DATA_DIR="$HOME/.local/share/exercise-form" mkdir -p "$DATA_DIR" # # # #

Static analysis

No suspicious patterns detected.