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Security audit

Crisp

Security checks for vulnerabilities and agentic risk

Overview

The Crisp actions have clear approval controls, but the required CLI can also install persistent agent skills without this skill explaining that effect.

Review CLI installation separately and use only the Crisp permissions you need. The publisher documents OO_SKILLS_SYNC_DISABLED=1 to prevent startup skill writes; configure it before invoking the CLI if you want to avoid those changes. Keep confirmation enabled for outgoing messages. The remote installers remain unverified, so this review cannot establish their exact installation effects.

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
Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
94% confidence
Finding

The supplied chunk performs remote installer execution rather than reading, creating, or updating Crisp data. Although dependency installation can be a supporting implementation detail, this chunk establishes no connection between the Oomol installer and the declared Crisp functionality. The downloaded script's contents and any further actions are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
97% confidence
Finding

The setup command pipes a remotely fetched, mutable script directly into Bash without verifying its integrity or reviewing it; the PowerShell alternative uses the same execution pattern. A compromised installer endpoint or distribution pipeline could execute arbitrary code with the agent's local privileges and access local credentials or files, although the command-not-found prerequisite limits exposure.

Content

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

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 80)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources