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Security audit

Readeck

Security checks for vulnerabilities and agentic risk

Overview

This Readeck skill is purpose-aligned, but it under-documents how to safely handle the API token and base URL, which could expose the token if misconfigured.

Install only if you will configure READECK_URL yourself to a trusted HTTPS Readeck instance and keep READECK_API_KEY scoped to that instance. Do not let task content or article URLs choose the API base URL, and confirm bookmark IDs carefully before running delete operations.

A.I.G

Vulnerability Patterns
  • Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
  • 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
Findings (1)

T09 · Insecure Skill Coding Practices

Warning
Location
SKILL.md:3
Finding

Configurable API Endpoint Can Expose the Readeck Bearer Credential

Content
View full analysis
Remediation
View remediation

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (2)

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 21)May include surrounding context.

Add a URL to Readeck for parsing and saving:

bash
curl -X POST "$READECK_URL/api/bookmarks" \
  -H "Authorization: Bearer $READECK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com/article"}'

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The markdown describes a DELETE request that removes a bookmark entry, but it provides no warning that this action is destructive or may remove user data. Because markdown files should disclose behaviors affecting user data or system integrity, this omission is a safety-relevant documentation gap.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.