Maintainer - behind security

Guilherme Alves

Pentester & Developer

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Cybersecurity, privacy and software development enthusiast

I’m a cybersecurity and software development enthusiast, always exploring new technologies and challenges. My main focus is on pentesting, but I also do web application development, as I believe it’s important to know how something works in order to be able to attack it. I also like to share knowledge through articles, writeups and open-source projects.

Software Development

I have a great interest in software development and enjoy creating efficient and scalable solutions. One of my main projects is Infomundi, an international news website that I developed from scratch. The back-end was built using Python, while the front-end was made with Bootstrap and Vanilla JS/CSS. I actively maintain the site and plan to make it open-source in the future.

CTFs

I am an information security enthusiast, always looking to learn and improve my skills. I actively participate in CTFs, where I put my knowledge of vulnerability exploitation, reverse engineering, and forensic analysis to the test. Additionally, I hold the eJPT and HTB CPTS certifications, which help validate my experience and commitment to the field of offensive security.

Articles

I write about topics related to cybersecurity, programming and privacy, covering everything from basic concepts to advanced techniques. My aim is to make knowledge accessible, with detailed explanations and practical examples to help beginners and professionals improve their skills.

Writeups

I publish detailed writeups of challenges and vulnerabilities, explaining the process of exploiting and solving problems found in CTFs, pentests and real security tests. My focus is on documenting learnings and sharing strategic approaches to analyzing and exploiting systems.

Skills

Python
Pentesting
Computer Networking
Linux
CTFs
Teamwork & Communication

Achievements

2024

Hack The Box

CPTS Certification

I did 100% of the practical part, plus a comprehensive 215-page pentest report, thus obtaining a satisfactory result in the Certified Penetration Testing Specialist (HTB CPTS) exam.

2022

eLearn
Security

eJPT Certification

I obtained a 95% pass rate in the eJPT exam, an international certification that covers methodologies for analyzing and auditing hosts, networks, and pentesting web applications.

2022

EDB-ID 50963

Exploit Author

I am the author of the code published and verified by several sources, used to exploit a critical vulnerability in the phpIPAM software (version 1.4.5).

2021

HackerSec

CTF Evo 2021 Winner

I was one of the winners of the 2021 edition of the CTF Evo event run by HackerSec, a leading cybersecurity company in Brazil.

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