Forms Accept Any Input Without Validation
Forms in your Base44 app accept and save any input without validation. Users can submit empty required fields, enter text in number fields, submit absurdly long strings, or inject HTML and scripts into text fields. This corrupts your data and can create security vulnerabilities.
Without validation, your database fills with garbage data: empty email fields, phone numbers with letters, negative quantities, and dates in the wrong format. Reports become unreliable, automated workflows break on bad data, and cleaning up the mess is time-consuming.
Worse, malicious users can inject scripts that execute when other users or admins view the submitted data, potentially stealing sessions or performing actions on their behalf.
Error Messages You Might See
Common Causes
- No field constraints configured — Base44 form fields don't have required, min/max, or format rules set
- Client-side validation only — HTML5 validation attributes exist but can be bypassed by submitting directly to the API
- Text fields without length limits — Users can paste megabytes of text into a single field, bloating the database
- Number fields accepting strings — Price, quantity, and age fields store whatever string is submitted
- No sanitization of HTML content — Rich text or description fields accept raw HTML and JavaScript
How to Fix It
- Add required field rules — Mark all mandatory fields as required in both the form configuration and the data table schema
- Set field type constraints — Configure number fields to accept only numbers, email fields to validate email format, and date fields to accept only valid dates
- Add length limits — Set maximum character limits on text fields (e.g., 255 for names, 1000 for descriptions)
- Sanitize text input — Strip HTML tags from plain text fields and sanitize rich text fields to allow only safe HTML elements
- Add server-side validation rules — Configure validation at the data layer so it can't be bypassed by direct API calls
Real developers can help you.
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I'm a Senior Android developer, open to work in various fields
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
Jared Hasson
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Yovel Cohen
I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well.
Antriksh Narang
5 years+ Experienced Dev (Specially in Web Development), can help in python, javascript, react, next.js and full stack web dev technologies.
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.
Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations.
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Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Why is client-side validation not enough?
Anyone can bypass browser validation by editing the HTML, disabling JavaScript, or sending requests directly to the API. Server-side or data-layer validation is the only reliable way to ensure data integrity.
How do I clean up existing bad data?
Export your table data, clean it in a spreadsheet by removing empty rows and fixing formats, then re-import. Going forward, add validation rules to prevent bad data from being saved.