Security audit

Fidel API

Security checks for vulnerabilities and agentic risk

Overview

This Fidel API skill is mostly coherent, but its setup instructions tell users or agents to run mutable remote installer scripts directly in a shell.

Review the oo CLI installation path before installing. Prefer an official, versioned, checksum- or signature-verified installer instead of piping remote scripts directly into bash or PowerShell. Once oo is already installed and connected, the skill's normal Fidel API usage is limited to read-only connector actions.

A.I.G

Vulnerability Patterns

Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
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
Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

Findings (1)

T03 · Remote Payload Retrieval and Execution

Error

Location: SKILL.md:60
Finding: Unverified Remote Installation Scripts Executed Directly by Shells
Content: View full analysis
Remediation: View remediation
" echo " oo-installer.sh" | sha256sum --check - less oo-installer.sh bash oo-installer.sh ``` 8. Provide an equivalent Windows workflow that downloads a version-pinned file, validates its Authenticode signature or published checksum, permits inspection, and executes it without `Invoke-Expression`. ]]>

SkillSpector

Vulnerability Patterns

Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
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

Findings (2)

External Script Fetching

High

Category: Supply Chain
Confidence: 98% confidence
Finding: The skill recommends installing software by piping a remote script directly into a shell (curl ... | bash), which creates a supply-chain execution risk if the remote host, transport, or script content is compromised. Because this appears in a skill that may be followed operationally by an agent or user during setup, it increases the chance of arbitrary code execution on the local machine.
Content: Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

oo: command not found — install the oo CLI (other platforms: https://cli.oomol.com/install-guide.md):

bash
curl -fsSL https://cli.oomol.com/install.sh | bash # macOS / Linux

powershell

Vague Triggers

Medium

Category: Not specified by scanner
Confidence: 96% confidence
Finding: The description says to use this skill for "ANY Fidel API request" and "Whenever a task involves Fidel API, use this skill," which is an extremely broad activation condition. It does not define boundaries, exclusions, or negative examples, so the skill could be invoked for loosely related requests beyond its intended scope.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.