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by The Hacker News

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1,711,157 coordinated disclosures
1,387,235 fixed vulnerabilities
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47,857 researchers, 1,654 honor badges

JulioCesar | Security Researcher Profile

Security researcher JulioCesar has already helped fix 340 vulnerabilities.

Researcher reputation:  20

Real name:
Júlio César Madeira Soares

About me:
With a keen interest for Information Security, as well as believing that Information Security does not need to be complex, Jlio Csar has started helping website owners identify, patch, and prevent vulnerabilities in their Web Applications, Mobile Applications, and in networks. Our mission is to help website owners and organizations defend against threats of all kinds to make positive changes to the information security industry for a more safe and secure future.

Contact email:
You can contact me via email - [email protected]

PGP: 0x2DEE241C

I encourage you to contact me ASAP so we can work together to quickly protect your users! All communication will be kept privat

Alternative Contacts:
Send me an email through the website contact form:

Certifications & Diplomas:
SANS Security 542

SANS Security 560

SANS Security 660

Experience in Application Security
1-3 years

Award / Bug Bounty I prefer:
Hall of Fame, thank you, written acknowledgement of discovery, Bug Bounty payment in bitcoin, Paypal or gift card, internship, job offer, etc

Halls of Fame:
Julio's profile on hackerone:

Julio's profile on Bugcrowd:

Recommendations and Acknowledgements

@ahaurw01     24 August, 2017
    Twitter ahaurw01 Aaron from Curiosity Media:
Thanks for finding a XSS bug on our site and going to great lengths to provide accurate details about it. Much appreciated!
@FinnJensen     20 February, 2017
    Twitter FinnJensen Finn Jensen from MyPressWire:
Julio Cesar found a Reflected XSS on our site and was quick to respond to emails. Big thanks and keep up the wonderful work.

Please login via Twitter to add a recommendation

Honor Badges

Number of Secured Websites

10+ Secured Websites Badge
50+ Secured Websites Badge
500+ Secured Websites Badge
Web Security Veteran Badge
10+ Websites
50+ Websites
500+ Websites
1000+ Websites

Advanced Security Research

WAF Bypasser Badge
CSRF Master Badge
AppSec Logic Master Badge
Fastest Fix Badge
WAF Bypasser
CSRF Master
30+ Reports
AppSec Logic Master
30+ Reports
Fastest Fix
Fix in 24 hours

Outstanding Achievements

Secured OBB Badge
OBB Advocate Badge
Improved OBB Badge
Secured OBB
OBB Advocate
Improved OBB

Commitment to Remediate and Patch

Patch Master Badge
Patch Guru Badge
Patch Lord Badge
Patch Master
55% Patched
Patch Guru
65% Patched
Patch Lord
75% Patched

Recommendations and Recognition

10+ Recommends
25+ Recommends
50+ Recommends

Distinguished Blog Author

Distinguished Blog Author Badge
Distinguished Blog Author Badge
Distinguished Blog Author Badge
1 Post
3 Posts
5+ Posts

Research Statistics

Total reports:487
Total reports on VIP sites:32
Total patched vulnerabilities:340
Recommendations received:2
Active since:02.02.2017

Open Bug Bounty Certificate

Researcher Certificate

Reported Vulnerabilities

All Submissions VIP SubmissionsFeatured Submissions

No posts in blog yet

  Latest Patched


  Latest Blog Posts

04.12.2023 by BAx99x
Unmasking the Power of Cross-Site Scripting (XSS): Types, Exploitation, Detection, and Tools
04.12.2023 by a13h1_
$1120: ATO Bug in Twitter’s
04.12.2023 by ClumsyLulz
How I found a Zero Day in W3 Schools
04.12.2023 by 24bkdoor
Hack the Web like a Pirate: Identifying Vulnerabilities with Style
04.12.2023 by 24bkdoor
Navigating the Bounty Seas with Open Bug Bounty

  Recent Recommendations

    22 May, 2024
Rajesh pointed out two different important vulnerabilities and supplied the necessary details for us to reproduce the issues. We appreciate his professionalism throughout the process.
    14 May, 2024
Thank you for reporting vulnerabilities on our site. Your prompt assistance enabled us to resolve the issue quickly.
    1 May, 2024
Got a recommendation to fix an SQL injection vulnerability on my website. As I am a hobbyist and my page is a hobby project, I can't offer money, so I am recommending this researcher. Thanks again.
    26 April, 2024
Thank you very much for identifying the XSS vulnerability and for our friendly email exchange.
    22 April, 2024
Thank you for your invaluable help in ensuring the security of our domain and its visitors!