Cursor
security
HTML Escaping Removed, Creating XSS Vulnerability
After Cursor refactored your template rendering code, HTML escaping was removed or disabled. User input is now rendered as HTML instead of being escaped, creating an XSS vulnerability.
Any user-supplied content could run malicious scripts.
Error Messages You Might See
Script tag executed in user content
JavaScript injected
Cookie/token stolen
Unexpected script execution
Common Causes
- HTML escaping disabled with dangerouslySetInnerHTML or v-html
- innerHTML used instead of textContent
- Template escaping turned off
- User input rendered without sanitization
- Third-party HTML inserted without validation
How to Fix It
Always escape user input in templates. React escapes by default (good). Never use dangerouslySetInnerHTML with user data. Sanitize with DOMPurify if HTML needed. Use Content Security Policy header. Validate and filter input server-side.
Real developers can help you.
Taufan
I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms.
Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact.
Nam Tran
10 years as fullstack developer
Krishna Sai Kuncha
Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : )
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
zipking
I am a technologist and product builder dedicated to creating high-impact solutions at the intersection of AI and specialized markets. Currently, I am focused on PropScan (EstateGuard), an AI-driven SaaS platform tailored for the Japanese real estate industry, and exploring the potential of Archify.
As an INFJ-T, I approach development with a "systems-thinking" mindset—balancing technical precision with a deep understanding of user needs. I particularly enjoy the challenge of architecting Vertical AI SaaS and optimizing Small Language Models (SLMs) to solve specific, real-world business problems. Whether I'm in a CTO-level leadership role or hands-on with the code, I thrive on building tools that turn complex data into actionable value.
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
Jen Jacobsen
I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses.
I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain.
PawelPloszaj
I'm fronted developer with 10+ years of experience with big projects. I have small backend background too
rayush33
JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How do I safely render user HTML?
Sanitize with DOMPurify: DOMPurify.sanitize(userHtml). Removes dangerous tags/attributes. Better than escaping.
What's Content Security Policy?
HTTP header that restricts script sources. Prevents inline scripts, external scripts not from whitelist. Protects against XSS.