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jrn.bsky.social
joern
@jrn.bsky.social
Still your mom’s favorite hacker!
Just ask the Bug Bounty community about their results…
November 18, 2025 at 5:54 PM
To reach us you can DM me or contact us via Email at [email protected] [4/4]
August 19, 2025 at 8:34 AM
The usual processes and medical contact points have failed us unfortunately and he seems stuck in this condition.

We’re based in Berlin, Germany but really any contact with a specialist who would be willing to take on this case we’d be grateful for! [3/4]
August 19, 2025 at 8:34 AM
(myoclonus and/or spasms) to finally find a cause and, above all, an effective therapy. The symptoms are bothering our son ever since he’s born, now for more than nine years, seriously affecting his sleep. [2/4]
August 19, 2025 at 8:34 AM
I am not 🥲
July 29, 2025 at 12:30 PM
Reposted by joern
you might find inspiration in joern's recent offensivecon talk. slides are at 0day.click/parser-diff-..., video at www.youtube.com/watch?v=Dq_K...
OffensiveCon25 - Joernchen - Parser Differentials: When Interpretation Becomes a Vulnerability
YouTube video by OffensiveCon
www.youtube.com
May 21, 2025 at 8:56 PM
Auf Youtube hab ich auch was :) youtu.be/j_Md8_7mhOU
joernchen - Friday 13th @ 1°C
YouTube video by Tiny Club Berlin
youtu.be
April 13, 2025 at 7:25 PM
☺️
April 13, 2025 at 6:52 PM
Happy Birthday!
March 24, 2025 at 9:35 AM
I was just recently pretty impressed by claude solving a few of my CTF challenges with a very simple prompt. :D
January 5, 2025 at 5:07 PM
That team that gets beaten up during a CTF. Purple because of the color of their bruises…
December 27, 2024 at 6:14 PM