Hi, I’m Daniel Miranda Barcelona AKA Excal1bur 👋

Tech enthusiast and offensive security with a background in resolving critical incidents in Oracle environments and now training to be a pentester. I complement my software engineering profession with CTF challenges, vulnerability exploration, and tool creation. Now studying for the OSCP, with the goal of moving into a technical cybersecurity career.

Introduction to Basic Network Security Concepts

18/05/2025

Learn the essential fundamentals to protect your networks from attacks and unauthorized access.

Critical Ivanti VPN Vulnerability – CVE-2025-22457 Explained

18/05/2025

A new critical vulnerability (CVSS 9.0) in Ivanti Connect Secure is being actively exploited. Here's what you need to know and how to stay safe.

Automated domain recognition and scanning

Bash • DNS

[Excal1bur] Writeups

Hacking • Cibersecurity

Notify_autoinstall | A script to install and configure notify automatically to send messages to a discord channel via a WebHook.

Python

CIF reverse shell

CIF

RCE script insecure deserialization with pickle

Python • Pickle