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Security audit

CraftMyPDF

Security checks for vulnerabilities and agentic risk

Overview

The CraftMyPDF workflow is clearly scoped, but its automatic setup executes unverified downloaded code and may install additional persistent agent skills.

Review and verify a fixed CLI release before allowing setup, and consider disabling its automatic skill synchronization. OOMOL will mediate access to your connected CraftMyPDF account. Confirm PDF payloads and hosted-output handling before execution. The remote installers and hosted implementation were not verified; no malicious behavior was established in the bundled file.

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
97% confidence
Finding

The supplied command performs remote software installation rather than any visible CraftMyPDF operation. Nothing in the supplied content establishes this installer as a supporting dependency for CraftMyPDF. The downloaded script's contents and further effects are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping the HTTPS installer response directly into bash executes mutable external content without an integrity check or review opportunity. Although the endpoint is consistent with the documented CLI dependency, compromise of that endpoint or its delivery infrastructure could result in arbitrary code execution under the agent's account; this is the same underlying issue as SQP-2.

Content

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

First-time setup executes remotely downloaded installation scripts without a security warning.

Medium
Category
Output Handling
Confidence
97% confidence
Finding

The setup instructions execute remotely retrieved shell or PowerShell code without a pinned version, independently verified integrity, or a user-approval checkpoint for installation. A compromised distribution endpoint could therefore execute arbitrary code with the agent process's privileges; limiting setup to a missing-CLI error reduces exposure but does not remove the risk.

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