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Security audit

Patchright Stealth Browsing

Security checks for vulnerabilities and agentic risk

Overview

This skill is a browser automation helper, but it is explicitly framed around bypassing anti-bot protections and includes sensitive session, proxy, and recording capabilities without enough safety boundaries.

Review carefully before installing. Use only for sites and accounts where you have clear authorization, avoid storing or reusing cookies unless necessary, disable video recording by default, and do not route authenticated traffic through untrusted proxies.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (7)

Ssd 4

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The narrative framing says the skill provides guidance for using stealth browser tools and for remaining undetected, which is classic evasion language rather than neutral automation documentation. That context increases risk because it conditions the agent to conceal activity while interacting with defended systems.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The README explicitly advertises stealth browser automation to bypass bot detection from named protection providers and presents this as a supported capability. In the context of an agent skill, this meaningfully enables evasion of access controls and abuse of third-party sites, especially because no safety boundaries, authorization requirements, or legitimate-use constraints are stated.

Content

No source excerpt is available for this finding.

Ssd 2

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The description uses softened natural language like 'perform stealth browser automation to bypass bot detection,' but the operational meaning is still evasion of defensive controls. In a skill manual, this is dangerous because it can disguise prohibited behavior as ordinary automation while still teaching the agent to defeat protections.

Content

No source excerpt is available for this finding.

Ssd 4

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The stepwise usage section teaches the agent to use stealth tooling for protected target URLs and to handle anti-bot blockers, CAPTCHAs, and timeouts gracefully, which amounts to operational guidance for working around defenses. This makes the skill more dangerous than a vague description because it provides actionable workflow patterns that support unauthorized scraping or account abuse.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
90% confidence
Finding

The skill explicitly instructs agents to save and restore authentication cookies, which can enable session hijacking if those cookies are exposed, persisted insecurely, or reused across tasks. In the context of a stealth-browsing skill designed to bypass bot protections, session reuse is especially sensitive because it facilitates covert authenticated access without reauthentication and without any warning, consent, or handling guidance.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The skill recommends recording browser interaction videos and saving them to disk, but provides no warning that recordings may capture passwords, personal data, session tokens, or other sensitive on-screen information. Because this skill is intended for stealth interaction on protected sites, recordings may also preserve evidence of authenticated or sensitive workflows that should not be retained by default.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The skill instructs users to route traffic through proxies and supply proxy credentials, but omits any warning that requests and credentials may traverse third-party infrastructure and be logged or intercepted. In a stealth-browsing skill explicitly aimed at bypassing Cloudflare, Akamai, and Datadome, proxy use materially increases the risk of covert traffic laundering, credential exposure, and abuse of untrusted network intermediaries.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.