Profile for joern
- Display name
- joernchen
- Username
- @joern@threatactor.club
- Role
- admin
About joern
Fields
- Website
- https://0day.click
- Threema
- https://threema.id/K8J68WTX
Bio
Your mom's favorite hacker!
My other account is @joernchen
- Joined
- Posts
- 708
- Followed by
- 1134
- Following
- 263
Stats
Recent public posts
include boosts
Really a huge honor for me to be invited to give a keynote at NULLCON Berlin in September.
Given my recent work focus at GitLab I'll share my thoughts around LLMs. Make sure to bring some popcorn!
If only I could remember where I put that token about 3 1/2 years ago
Veranstaltungshinweis: https://www.eschschloraque.de/neon-bellies-27062025
Bin ein bisschen aufgeregt wegen https://www.offensivecon.org/speakers/2025/joernchen.html morgen
Cross functional steakholder or something, no clue I don’t eat meat…
Thanks AI
Parser Differentials have become pretty much my favorite bug class over the last years.
I am absolutely honored to get the chance to present on this topic at OffensiveCon in a few weeks.
Felt cute, might delete later
AI being useful
Soooo I built a little website based exploit for some CORS issue. Claude was really helpful to not only spit out a reasonably fast portscanner to use to find the target but also I used it to have a dark/light mode with a toggle and detection of the system default for the site.
OH: "Cloud und Rüben"
Digitalisierung, Symbolbild.
Supply chain security
The average bug bounty person
Next question:
Since I try to stay off of Twitter and don't post any more content over there please suggest some accounts I should follow here. My timeline needs some more content :D
I got a week of PTO left.
What code should I read? Please drop suggestions with a reason why I should read it.
I messed up my gotosocial instance here at threatactor.club, it's running on fly.io and a very long migration was interrupted by a health check.
I was fiddling with the sqlite DB for a while and tried to recover that mess... until I noticed that there are automated snapshots of the volume which holds the DB, daily with five days of retention. Huge props to fly.io for saving my virtual ass with this.