Title: W3C HTML validation error
Last modified: June 22, 2026

---

# W3C HTML validation error

 *  Resolved [rasterix](https://wordpress.org/support/users/rasterix/)
 * (@rasterix)
 * [2 weeks ago](https://wordpress.org/support/topic/w3c-html-validation-error-4/)
 * Hi, the Login form’s submit button (`#wppb-submit`) renders with a malformed 
   trailing attribute in its HTML output:
   `<input type="submit" name="wp-submit"
   id="wppb-submit" class="button button-primary" value="Log In" "="">`
 * Browsers parse the stray `" "="">` sequence as an empty, nameless attribute, 
   rather than valid HTML. This isn’t a WCAG accessibility failure (the button’s
   accessible name, role, and behaviour are unaffected), but it is invalid markup
   that fails HTML validators (e.g. W3C Markup Validator).
 * We’ve confirmed it persists regardless of theme customisations and isn’t controllable
   via the `wppb_form_submit_extra_attr` filter, suggesting it’s hardcoded into 
   the login form’s button template. Could you confirm whether this is a known issue
   and if a fix is planned?
 * Thanks.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fw3c-html-validation-error-4%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Support [thomaswild](https://wordpress.org/support/users/thomaswild/)
 * (@thomaswild)
 * [1 week, 6 days ago](https://wordpress.org/support/topic/w3c-html-validation-error-4/#post-18945780)
 * Hello [@rasterix](https://wordpress.org/support/users/rasterix/),
 * I have checked a local instance and noticed that the same sequence is present
   there as well. I have forwarded this to our development team.
 * Thank you for reporting this issue!

Viewing 1 replies (of 1 total)

You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fw3c-html-validation-error-4%2F%3Foutput_format%3Dmd&locale=en_US)
to reply to this topic.

 * ![](https://ps.w.org/profile-builder/assets/icon-256x256.png?rev=2961144)
 * [User Profile Builder - Beautiful User Registration Forms, User Profiles & User Role Editor](https://wordpress.org/plugins/profile-builder/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/profile-builder/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/profile-builder/)
 * [Active Topics](https://wordpress.org/support/plugin/profile-builder/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/profile-builder/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/profile-builder/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [thomaswild](https://wordpress.org/support/users/thomaswild/)
 * Last activity: [1 week, 6 days ago](https://wordpress.org/support/topic/w3c-html-validation-error-4/#post-18945780)
 * Status: resolved