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.
BurnHavoc
Been around fixing other peoples code for 20 years.
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
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
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Luca Liberati
I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture
hanson1014
Full-stack developer experienced in fixing and deploying AI-generated apps from Lovable, Bolt.new, Cursor, and Replit. I specialize in debugging Supabase integration issues (auth flows, RLS policies, database connections), fixing broken deployments, resolving routing/blank screen problems, and cleaning up messy React/Vite codebases. I also build production apps with the Claude API and have shipped a Mac desktop dev tool (Nexterm from scratch. Based in Hong Kong, fast turnaround.
PawelPloszaj
I'm fronted developer with 10+ years of experience with big projects. I have small backend background too
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
David Olverson
Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production.
Tejas Chokhawala
Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript.
Focused on performance, clean architecture and shipping fast.
Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools.
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.