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Security audit

Eventee

Security checks for vulnerabilities and agentic risk

Overview

The skill is coherent for Eventee read-only connector use, but its first-time setup recommends executing remote installer scripts directly.

Review the first-time setup before installing. Prefer installing the oo CLI through a verified package manager or a downloaded installer with checksum/signature verification instead of piping a live remote script directly into a shell. Once the CLI is already installed and connected, the skill's Eventee actions appear limited to disclosed read operations.

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:59
Finding

Unverified Remote Installation Scripts Are Executed Directly

Content
View full analysis

Vulnerability Details

File Location: SKILL.md:59-63
Vulnerability Type: Remote payload retrieval and execution
Risk Level: High

Complete Code Snippet:

bash
curl -fsSL https://cli.oomol.com/install.sh | bash    # macOS / Linux
powershell
irm https://cli.oomol.com/install.ps1 | iex           # Windows PowerShell

Technical Analysis

The first-time setup instructions retrieve mutable scripts from cli.oomol.com and pass their contents directly to a command interpreter. The scripts are executed without version pinning, cryptographic signature verification, checksum validation, or an intermediate inspection step.

Consequently, the code ultimately executed can differ from the content available when this Skill was audited. Compromise of the remote hosting infrastructure, release pipeline, domain, or applicable network trust chain could turn these installation commands into an arbitrary-code execution channel.

Installing the CLI is not required for ordinary Skill operation when it is already present. Although the instructions limit this fallback to cases where oo is unavailable, installation still exceeds the minimum privileges needed to perform Eventee read operations and introduces avoidable supply-chain risk. No evidence in the reviewed file establishes that either remote script is itself malicious; the vulnerability is the unverified download-and-execute mechanism.

Attack Path

  1. The oo executable is absent or cannot be resolved through the current environment.
  2. The resulting oo: command not found condition causes the Agent or user to follow the first-time setup instructions.
  3. The shell retrieves the current script from https://cli.oomol.com/install.sh or https://cli.oomol.com/install.ps1.
  4. An attacker who has compromised the remote script, hosting pipeline, domain, or relevant trust chain supplies modified executable content.
  5. bash or PowerShell immediatel ...[truncated 850 chars]
Remediation
View remediation

Remediation Suggestions

  1. Remove direct curl | bash and irm | iex installation patterns.
  2. Prefer a trusted platform package manager or a version-pinned release artifact from a verified publisher.
  3. Download the installer to a local file rather than piping it directly to an interpreter.
  4. Verify a publisher-provided cryptographic signature or a checksum obtained through an independently protected channel.
  5. Display the installer source, version, destination, and expected system changes before execution.
  6. Require explicit user approval before downloading or running installation code.
  7. Execute the installer with the least-privileged account available and avoid elevation unless a documented operation strictly requires it.
  8. Pin an approved CLI version and document a controlled update process so reviewed installer behavior cannot change silently.

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 via curl ... | bash, which executes a remote script directly without verification. If the distribution host, TLS trust chain, or script content is compromised, this enables arbitrary code execution on the user's machine.

Content

Scanner excerpt · SKILL.md (reported line 59)May include surrounding context.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The description says to use this skill for "ANY Eventee request" and "Whenever a task involves Eventee," which is a very broad activation condition. This lacks clear scope boundaries or exclusion examples, increasing the chance of unintended invocation for casual mentions or loosely related tasks.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.