- Success Criterion 3.3.8
- Conformance level AA
Password Field Scripted to Block Paste Entirely
3.3.8 — Accessible Authentication (Minimum)
Scenario
Setting
An insurance company's claims form
What’s wrong
Password fields with onpaste="return false" or JS paste blocking — memorization/transcription cognitive test with no alternative.
Example
<!-- Login requires solving an image CAPTCHA, no alternative -->Why it matters
People with cognitive disabilities and anyone who depends on password managers or paste.
How to test
Try to paste into a password field (right-click Paste or Ctrl/Cmd+V): if onpaste="return false" or similar JS blocks it, it fails.
How to fix
Login must work with paste and password managers — any cognitive test must have a non-cognitive alternative method.
<!-- Login uses email + password, or a passkey, with no puzzle/transcription step -->Authentication can't rely solely on solving a puzzle or transcription task with no cognitive-function-test alternative.
Outcome
On an insurance company's claims form, this barrier is gone for people with cognitive disabilities and anyone who depends on password managers or paste — they no longer have to work around this.
Who is affected
People with cognitive disabilities and anyone who depends on password managers or paste.
Learn more
- Understanding Understanding document (opens in a new tab)
Related scenarios
- Password Field That Blocks Pasting or Splits the Code Up
- Password Manager Autofill Blocked by the Login Form
- Visual CAPTCHA Required With No Non-Visual Alternative
- Puzzle CAPTCHA Gating Login With No Alternative Method
- One-Time Code Split Into Boxes That Reject a Pasted Code
- Displayed Code Required to Be Retyped With Copying Disabled