John Blackbourn (@johnbillion) – WordPress user profile

Bio

I’m one of the team of WordPress core developers. I was the release lead for WordPress 4.1 and 4.9.1. I work as the Director of WordPress Security at Human Made and I’m the WordPress core security team lead.

Previously I’ve worked at Code For The People and WordPress.com VIP.

Badges

CODE

6 badges

Core Contributor '15 Core Team '15 Meta Contributor '15 Plugin Developer Security Contributor '22 Security Team '22

CONTENT

1 badge

Documentation Contributor '17

COMMUNITY

5 badges

bbPress Contributor '19 B BuddyPress Contributor '19 Meetup Organizer '18 WordCamp Organizer '20 WordCamp Speaker '19

PRACTICE

2 badges

Accessibility Contributor '19 Support Contributor '26

POLYGLOTS

1 badge

Translation Contributor '15

Current Job

Present

Human Made Ltd

Recent impact

Score weights high-impact work (commits, releases, approved translations, props) at 3x routine activity.

Last 30 days

26contributions

high8

medium18

score42

Last 90 days

128contributions

high72

medium56

score272

Last 12 months

830contributions

high500

medium330

score1830

Team focus

Share of contributions across teams during the last 365 days

WordPress releases

Contributed to 39 releases

Time commitment

16 hours per week of sponsored contribution time

Human Made

Contributions

Type

July 2026

Jul 11 Sat · 13:39

Core med

Closed ticket #62598 on Core Trac:
Application password, cant revoke

Jul 09 Thu · 00:24

Plugins high

Committed [3600887] to Plugins SVN:
Update to version 1.12.1 from GitHub

Jul 07 Tue · 23:50

Forums med

Posted a reply to The transparent background color of the QM window, on the site WordPress.org Forums:
I can't support Chrome < 109, sorry.

Jul 07 Tue · 23:24

Core med

Closed pull request #687 on WordPress/wordpress-develop:
Feature/wp setcookie

Jul 07 Tue · 23:23

Core med

Submitted pull request #12444 to WordPress/wordpress-develop:
#37000 Set SameSite to Lax via a new `setcookie()` wrapper

Jul 07 Tue · 19:44

Forums med

Posted a reply to Slow query flagged but no clear source, on the site WordPress.org Forums:
Does the "Caller" column in the Database Queries -> Slow Queries panel show anything?

Jul 07 Tue · 19:31

Meta high

Made 2 updates to handbook pages on Making WordPress Secure.

Jul 07 Tue · 19:15

Core med

Submitted pull request #12441 to WordPress/wordpress-develop:
#64896 Tighten the documented types in `WP_Hook`

Jul 07 Tue · 18:25

Core med

Submitted pull request #12440 to WordPress/wordpress-develop:
#64896 Correct the documentation for the `plugin` property in the `wp_get_connectors()` array

Jul 06 Mon · 16:38

Core high

Mentioned in [62644] on WordPress SVN:
Build/Test Tools: Revert [62525].