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

85contributions

high65

medium20

score215

Last 90 days

324contributions

high214

medium110

score752

Last 12 months

934contributions

high599

medium335

score2132

Team focus

Share of contributions across teams during the last 365 days

WordPress releases

Contributed to 40 releases

Time commitment

16 hours per week of sponsored contribution time

Human Made

Contributions

Type

September 2026

Sep 09 Wed · 11:14

Core med

Created ticket #66079 on Core Trac:
Update the reverbnation.com oEmbed endpoint

Sep 09 Wed · 11:10

Core med

Created ticket #66078 on Core Trac:
Remove someecards.com as an oEmbed provider

Sep 09 Wed · 10:27

Core med

Created ticket #66077 on Core Trac:
Unapproved comment preview renders oEmbed URL differently from the ...

Sep 09 Wed · 09:57

Core med

Closed ticket #59142 on Core Trac:
X/Twitter posts cannot be embedded

Sep 09 Wed · 09:05

Forums med

Posted a reply to Critical Error after Upgrade, on the site WordPress.org Forums:
Thanks for letting me know. Glad you got it fixed!

Sep 08 Tue · 22:16

Forums med

Posted a reply to Critical Error after Upgrade, on the site WordPress.org Forums:
Right but that's a generic error message, I can't help without seeing the technical info…

Sep 08 Tue · 21:30

Core high

Mentioned in [63544] on WordPress SVN:
Multisite: Restore missing user reassignment dropdown when deleting user.

Sep 08 Tue · 20:47

Forums med

Posted a reply to Critical Error after Upgrade, on the site WordPress.org Forums:
What's the error?

Sep 08 Tue · 18:35

Core high

Mentioned in [63540] on WordPress SVN:
Code Quality: Narrow the `esc_sql()` parameter and return types.

Sep 07 Mon · 17:10

Core high

Mentioned in [63519] on WordPress SVN:
Build/Test Tools: Use exclusion-first workflow path filters.