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Security audit

Unlock PDF

Security checks for vulnerabilities and agentic risk

Overview

This skill does what it says: it uploads a user-provided encrypted PDF and password to PDFAPIHub to return an unlocked PDF, with the main risk clearly disclosed.

Only use this for PDFs you are allowed to unlock, and avoid highly sensitive documents unless you accept sending both the document and its password to PDFAPIHub. Use secure handling for the API key and password instead of copying real secrets into examples or saved files.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (4)

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 41)May include surrounding context.

Example Usage

bash
curl -X POST https://pdfapihub.com/api/v1/unlockPdf \
  -H "CLIENT-API-KEY: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The example hard-codes values that look like real secrets: an API key field populated with "your_api_key" and a concrete password value "secret123". Even if intended as illustrative placeholders, embedding credential- and password-shaped literals in examples can normalize unsafe secret handling, lead users to copy sensitive data into manifests, and increase accidental exposure in logs, version control, or support artifacts.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The skill sends highly sensitive material to a third-party service: the encrypted PDF itself and the password needed to decrypt it. Although the description mentions that data is sent to pdfapihub.com, it does not present an explicit privacy/security warning, retention statement, or user-consent mechanism at the point of use, so users may unknowingly transmit confidential documents and credentials to an external processor.

Content

No source excerpt is available for this finding.

Vague Triggers

Low
Category
Not specified by scanner
Confidence
82% confidence
Finding

This JSON manifest appears to define a skill action but provides no indication of when it should be invoked, what user intents it is meant to handle, or any exclusion conditions. For manifest files, missing trigger specificity can cause unintended invocation because the action is described only by a generic API call structure.

Content

No source excerpt is available for this finding.