Back to skill

Security audit

Passcreator

Security checks for vulnerabilities and agentic risk

Overview

The Passcreator workflow is coherent, but its setup fallback can execute remote installation code without separate user approval.

Review the setup fallback before enabling this skill. Prefer installing a verified CLI yourself, and require approval before software installation or changes to other agent skills. OOMOL mediates Passcreator account operations. The bundled workflow requires confirmation for writes, but the external installers were unavailable for inspection.

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
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied chunk performs no visible Passcreator operations. Its sole action executes an installer from a different service, with no demonstrated connection to Passcreator. Although dependency installation can be a supporting implementation detail, the supplied content provides no evidence of that relationship. The downloaded script's further behavior cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a remotely fetched installer directly into bash executes mutable external code without an independent integrity check or review; the PowerShell alternative has the same weakness. HTTPS protects transport but not against a compromised distribution endpoint, which could deliver code running with the agent process's local permissions; the missing-CLI prerequisite and any enforced tool restrictions reduce exposure.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

Fallback setup executes remote installation scripts without warning the user about system changes.

Medium
Category
Output Handling
Confidence
92% confidence
Finding

The fallback instructs the agent to install software after a missing-command error without requiring approval or explaining the resulting system changes. Although conditional and related to a legitimate prerequisite, it can expand a Passcreator data request into local code execution and persistent environment changes; the declared oo-only tool restriction may limit execution if enforced.

Content

No source excerpt is available for this finding.

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 79)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