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

68contributions

high65

medium3

score198

Last 90 days

506contributions

high399

medium107

score1304

Last 12 months

1046contributions

high734

medium312

score2514

Team focus

Share of contributions across teams during the last 365 days

WordPress releases

Contributed to 40 releases

Time commitment

40 hours per week

Human Made 20 hrs/wk
On my own time 20 hrs/wk

Contributions

Type

October 2026

Oct 21 Wed · 15:45

Meta high

Received props from @4thhubbard in Slack:
Props to @Clorith @johnbillion @desrosj @rfaile313 @barry @whyisjake @jorbin @peterwilsoncc @annezazu for wrangling all the…

Oct 21 Wed · 13:44

Meta high

Wrote a new post, Critical PHP Security Release, on the site WordPress News:
The PHP project has announced a security release that fixes two critical security vulnerabilities discovered…

Oct 21 Wed · 04:11

Core med

Reopened ticket #66355 on Core Trac:
Update bundled root certificates for 7.2

Oct 19 Mon · 23:40

Core high

Mentioned in [64586] on WordPress SVN:
Upgrade/Install: Explain when automatic updates cannot run.

Oct 18 Sun · 15:28

Forums med

Posted a reply to Yet another plugin to be ruined by Awesome Motive, on the site WordPress.org Forums:
@sixaxis Oh come on. This plugin is now loaded up with a pile of free…

Oct 16 Fri · 17:03

Core high

Mentioned in [64402] on WordPress SVN:
Rewrite Rules: Add support for random content redirects.

Oct 14 Wed · 21:54

Core high

Mentioned in [64348] on WordPress SVN:
Login and Registration: Support `/.well-known/change-password`.

Oct 11 Sun · 21:24

Core high

Mentioned in [64301] on WordPress SVN:
Admin: Add screen option to turn off moving meta boxes.

Oct 09 Fri · 14:41

Core high

Mentioned in [64256] on WordPress SVN:
Editor: Disable the Classic Block (TinyMCE) elementpath UI.