Agent skill · security · jeremylongshore
scanning-for-xss-vulnerabilities
Execute this skill enables AI assistant to automatically scan for xss
Why this skill is useful
Adds executable scripts for detecting and reporting XSS vulnerabilities that are not covered by generic security practices.
What it needs
Requires grep installed locally. About 2k tokens when loaded. Last updated 2026-08-07. 2,604 stars on the source repository.
What this skill does
Xss Vulnerability Scanner Detect reflected, stored, and DOM-based XSS vulnerabilities through context-aware analysis of HTML, JavaScript, CSS, and URL injection points, with WAF bypass testing and CSP evaluation. Overview This skill empowers Claude to proactively identify and report XSS vulnerabilities within your codebase. By leveraging advanced detection techniques, including context-aware analysis and WAF bypass testing, this skill ensures your web applications are resilient against common XSS attack vectors. It provides detailed insights into vulnerability types and offers guidance on remediation strategies. How It Works 1. Activation: Claude recognizes the user's intent to scan for XSS vulnerabilities through specific trigger phrases like "scan for XSS" or the shortcut "/xss". 2. Code Analysis: The plugin analyzes the codebase, identifying potential XSS vulnerabilities across different contexts (HTML, JavaScript, CSS, URL). 3. Vulnerability Detection: The plugin detects reflected, stored, and DOM-based XSS vulnerabilities by injecting various payloads and analyzing the responses. 4. Reporting: The plugin generates a report highlighting identified vulnerabilities, their location in the code, and recommended remediation steps. When to Use This Skill This skill activates when you need to: Perform a security audit of your web application. Review code for potential XSS vulnerabilities. Ensure compliance with security standards. Test the effectiveness of your Content Security Policy (CSP). Identify and mitigate XSS vulnerabilities before deploying to production. Examples Example 1: Detecting Reflected XSS User request: "scan for XSS vulnerabilities in the search functionality" The skill will: 1. Analyze the code related to the search functionality. 2. Identify a reflected XSS vulnerability in how search queries are displayed. 3. Report the vulnerability, including the affected code snippet and a suggested fix using proper sanitization. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills jeremylongshore/scanning-for-xss-vulnerabilities