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Niklas Heringer - Cybersecurity & Math

Ctf

  • Uni Exam Practice VM practice: more of LFI2RCE

    Posted on 6 mins

    In this university exam practice VM, I explored file upload handling, discovered a separate file inclusion point, and chained it with an uploaded webshell to gain remote command execution.
    Uni Exam Practice VM practice: more of LFI2RCE
  • Intro to File Inclusion

    Posted on 8 mins

    An in-depth and hands-on walkthrough on spotting and exploiting Local File Inclusion (LFI) — from classic payloads to modern bypasses, straight from HTB Academy labs.
    Intro to File Inclusion
  • Breaking Htb Underpass

    Posted on 11 mins

    Cracked the UnderPass HTB box by skipping dead ends, abusing SNMP leaks, and turning mosh-server into a root shell with zero password — here is how.
    Breaking Htb Underpass
  • What I Do After the User Flag — My Beginner’s Priv Esc Flow

    Posted on 4 mins

    Getting user.txt is just the beginning. Here’s how I hunt for privilege escalation paths on Linux boxes — what I check, how I think, and why it still stumps me sometimes.
    What I Do After the User Flag — My Beginner’s Priv Esc Flow