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Security audit

Polsia R2 Proxy

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward remote file-upload helper, with the main caveat that uploaded files leave your environment and are stored behind Polsia's Cloudflare R2/CDN setup.

Install only if you intend to use Polsia's remote R2 proxy. Treat uploaded files as leaving your local environment, and avoid sensitive or regulated files unless you trust Polsia's retention, sharing, and CDN access policies.

A.I.G

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

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 (1)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The skill instructs users to upload files to a remote third-party endpoint but does not clearly warn that file contents will be transmitted off-platform to Polsia's proxy and stored in Cloudflare R2. This can cause unintended disclosure of sensitive or regulated data because users may reasonably assume the action is local or inadequately understand the external data flow.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.