About
As a Senior Penetration Tester on the Advanced Services team at Synack, I contribute to…
Articles by Sergio
Activity
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Synack Launches AI-Driven Glasswing-Readiness Assessment to Map Attack Surface Risks Read more on our website: https://lnkd.in/d_5ZWTjk Synack has…
Synack Launches AI-Driven Glasswing-Readiness Assessment to Map Attack Surface Risks Read more on our website: https://lnkd.in/d_5ZWTjk Synack has…
Liked by Sergio Medeiros
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🚨 Fortinet just disclosed CVE-2026-39808 and CVE-2026-39813 - 2 vulnerabilities affecting FortiSandbox. Both carry a CVSS score of 9.1, making them…
🚨 Fortinet just disclosed CVE-2026-39808 and CVE-2026-39813 - 2 vulnerabilities affecting FortiSandbox. Both carry a CVSS score of 9.1, making them…
Liked by Sergio Medeiros
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🔥 Automated bug bounty chain. Gemini hunts for you now. I just say 'bb full <target>' → Gemini CLI runs my entire BB automation chain. 👇 What…
🔥 Automated bug bounty chain. Gemini hunts for you now. I just say 'bb full <target>' → Gemini CLI runs my entire BB automation chain. 👇 What…
Liked by Sergio Medeiros
Experience
Education
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West Valley College
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Computer science major with a focus in cybersecurity, infosec, penetration testing, pentesting, pentester, pentest. Unfortunately have not graduated due to taking a full time role at intel corporate headquarters.
Licenses & Certifications
Publications
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Founder of CVE-2024-37629
NIST
See publicationA recent CVE that I discovered related to SummerNote 0.8.18 which is vulnerable to Cross Site Scripting (XSS) via the Code View Function.
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Founder of CVE-2024-34241
NIST
See publicationI recently discovered a cross-site scripting (XSS) vulnerability in Rocketsoft Rocket LMS 1.9 allows an administrator to store a JavaScript payload using the admin web interface when creating new courses and new course notifications.
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Founder of CVE-2024-34240
NIST
See publicationA recent CVE that I discovered in QDOCS Smart School 7.0.0 which is vulnerable to Cross Site Scripting (XSS) resulting in arbitrary code execution in admin functions related to adding or updating records.
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Founder of CVE-2023-31045
NIST
See publicationA recent CVE that I discovered. A stored Cross-site scripting (XSS) issue in Text Editors and Formats in Backdrop CMS before 1.24.2 allows remote attackers to inject arbitrary web script or HTML via the name parameter.
Courses
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Bug Bounty Hunting - Offensive Approach to Hunt Bugs
From Vikash Chaudhary
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CompTIA CySA+ Bootcamp
Dion Training
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CompTIA Pentest+ Bootcamp
Dion Training
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CompTIA Security+ (SY0-601) Bootcamp
Dion Training
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Discover Web Application Security Issues using Burp Proxy
By Rajganesh Pandurangan
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External Pentest Playbook
TCM Security
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Intro to Bug Bounty Hunting and Web Application Hacking
From Ben Sadeghipour
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Learn Python & Ethical Hacking From Scratch
zSecurity
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Modern Ethical Hacking - Complete Course
From Vonnie Hudson
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Movement, Pivoting and Persistence
TCM Security
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OSINT Fundamentals
TCM Security
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OSWE Course
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Penetration Testing Student
INE.com
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Practical Ethical Hacking - The Complete Course
TCM Security
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Red Team Ethical Hacking - Beginner
From Chris Sikes
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Red Team Ethical Hacking - Intermediate
From Chris Sikes
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The RedTeam Blueprint - A Unique Guide To Ethical Hacking
RedTeam Nation
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Website Hacking / Penetration Testing & Bug Bounty Hunting
zSecurity
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Windows Privilege Escalation for Beginners
TCM Security
Projects
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Grumpz Blog - Bug Bounty Hunting and More!
Documenting my learning, and path of becoming a professional hacker and bug bounty Hunter, attempting to share knowledge to help others become successful in the cyber security space.
Honors & Awards
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Level 5 Synack Red Team Member
Synack
Ranked Level 5 out of 5 on the Synack Red Team platform.
- Top 20 in USA
- Top 80 on the platform -
Placed Top 700 MetaCTF CyberGames 2021
MetaCTF
Competed in a team event as a solo with various colleges in a cybersecurity capture the flag event with various penetration testing challenges ranging from web application security, reverse engineering binaries, and various pentesting challenges.
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Top 1% on TryHackMe
TryHackMe
Currently level 9, and ranked Top 1% on TryHackMe penetration testing, infosec, cybersecurity labs.
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Active Member of OWASP (Open Web Application Security Project)
Open Web Application Security Project / OWASP
Active member of the Open Web Application Security Project.
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Completed 10+ Hard Boxes
Offensive Security Proving Grounds
Being an active subscriber to Offensive Security's Proving Grounds, a penetration testing/cyber security lab, I have completed 10+ boxes ranging from Medium to Very Hard per the Proving Grounds Community, to prepare prior to pursuing my OSCP certification.
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Received 2 Private Bug Bounty Invitations
HackerOne
Competing in the HackerOne CTF I earned enough points when completing their penetration testing, web application hacking, cybersecurity challenges.
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Competed in HackPack CTF 2021
hackpack.club
HackPack CTF is a security competition that is part of the two security courses at NCSU: CSC-405 Computer Security and CSC-591 Systems Attacks and Defenses. The target audience is people interested in computer security that have some related background (like took a security course before ;) and want to exercise their skills in a secure environment by solving security challenges.
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Competed in KringleCon 2021
SANS
r. The SANS Holiday Hack Challenge is a FREE series of super fun, high-quality, hands-on cybersecurity challenges where you learn new skills, help Santa defeat cybersecurity villains, and save the whole holiday season from treachery. The SANS Holiday Hack Challenge is for all skill levels, with a stellar prize at the end for the best of the best entries.
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Competed in Metasploit CTF 2021
Rapid7
Metasploit community CTF event
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Competed in h@cktivitycon CTF 2021
HackerOne
h@cktivitycon is a HackerOne hosted hacker conference built by the community for the community. After a successful inaugural h@cktivitycon 2020 with over 12,000 registrants, we are back this year for an even bigger and better conference!
h@cktivitycon is a place for hackers to learn, share, and meet friends. Join Vickie Li, NahamSec, and friends for CTFs, prizes, talks, villages, and more for h@cktivitycon 2021. -
Sales Pinnacle Award 2017
Merchant eSolutions
Achieving over 100%+ in annual in year net contribution sales quota
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Core Leadership Award 2016
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Going above and beyond and serving as a model in regard to the Leadership Core Value in the organizational goals.
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Core Leadership Award 2015
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Serving as a model in the leadership core value to others in the organization
Languages
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English
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