1. X
  2. Sybre Waaijer
Log inSign up
Sybre Waaijer
2,285 posts
Sybre Waaijer profile banner
user avatar

Sybre Waaijer

@SybreWaaijer
FOSS founder @TheSEOFramework & @troy_wp. Senior full-stack offensive web engineer/architect. w.org/@cybr I run on caffeine & solar power.
The Netherlands
github.com/sybrew
Joined December 2016
69
Following
1,265
Followers
RepliesRepliesMediaMedia

Log in or sign up for X

See what’s happening and join the conversation

Continue with phone
or
Log in with username or email
Terms·Privacy·Cookies·Accessibility·US TIDA·Ads Info·© 2026 X Corp.
  • Pinned
    user avatar
    Sybre Waaijer
    @SybreWaaijer
    Dec 8, 2025
    My commitment to Open Source.
    Open Source 𒄬 Deploy Troy
    From deploytroy.org
  • user avatar
    Sybre Waaijer
    @SybreWaaijer
    15h
    Two days ago, Rank Math closed about a dozen security issues in 1.0.277. This plugin runs on over 4 million sites. In that same update, group[.]one (who also owns WP Rocket) now gets administrative privileges to your site. Last time, I classified something like this as a
  • user avatar
    Sybre Waaijer
    @SybreWaaijer
    Aug 25
    user avatar
    Matt Mullenweg
    @photomatt
    Jan 18, 2023
    I can never spell bureaucracy correctly on first try.
  • user avatar
    Sybre Waaijer
    @SybreWaaijer
    Aug 20
    "No harm here." Updated your WPCS yet? Don't lint untrusted code until you're on 3.4.1. github.com/WordPress/Word…
    00:00
  • user avatar
    Sybre Waaijer
    @SybreWaaijer
    Aug 12
    Is it still a zero-day after they ignored me 4 years ago? 7.0.5 in 3... 2... 1...
    user avatar
    Sybre Waaijer
    @SybreWaaijer
    Aug 12
    Replying to @WordPress
    Fix this one next: wp_crop_image() takes any post ID, reads _wp_attached_file, and sends that path to the image editor. It never checks that the ID is an image. I reported that in 2022 (HackerOne 1593366, with a PoC). It is still sitting there in 7.0.4. You just taught Imagick