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Security audit

Docsend2pdf

Security checks for vulnerabilities and agentic risk

Overview

The conversion workflow fits its purpose, but automatic setup can introduce persistent changes to other agent skills without clearly explaining them.

Review the CLI installation and disable automatic skill synchronization if you want only document conversion. Submit confidential links only when you authorize OOMOL and Docsend2pdf to access them. The remote installer contents and hosted processing remain unverified.

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 declared purpose concerns accessing Docsend2pdf data, but the supplied code runs an installer from a different service. Nothing in the supplied chunk establishes that this installation supports the declared functionality. The downloaded script's contents are not provided, so its further behavior cannot be assessed.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command executes a remotely fetched, mutable script directly in a shell without inspection, version pinning, or independent integrity verification. Compromise of the distribution endpoint could execute attacker-controlled code with the agent process's permissions; the missing-CLI prerequisite limits exposure but does not mitigate execution risk, and the PowerShell alternative has the same issue.

Content

Scanner excerpt · SKILL.md (reported line 55)May include surrounding context.

The conversion workflow lacks a privacy warning about sending DocSend URLs to a third-party service.

Medium
Category
Output Handling
Confidence
90% confidence
Finding

DocSend URLs can contain access-bearing identifiers or lead to confidential documents; sending them through OOMOL to a conversion provider exposes them outside the original document-sharing context. The skill openly names these services, reducing the likelihood of deceptive exfiltration, but its blanket treatment of untagged actions as safe reads does not account for this sensitive-data transfer.

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 70)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