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42,012 researchers, 1,626 honor badges

PauloChoupina | Security Researcher Profile

Security researcher PauloChoupina has already helped fix 79 vulnerabilities.

Researcher reputation:  130

Real name:
Paulo Choupina

About me:
I try to only report high profile websites but I did my fair share of unimportant reports aswell.

check out my website:

Contact email:
[email protected]

Experience in Application Security
over 5 years

Award / Bug Bounty I prefer:
Just a nice comment on my profile would be great, but if you really wanna make my day offer me something.

Halls of Fame:
November 2019 position 9

Follow me on:

Ethics and Rules:
Paulo Choupina is required to abide by the ethics and rules of the Open Bug Bounty project. If you reasonably believe that rules are not respected, please report this to us.

Recommendations and Acknowledgements

@pmbfurtado     18 March, 2019
    Twitter pmbfurtado Pedro Furtado from CustoJusto:
Paulo Choupina found and responsibly reported a vulnerability on our site. Thanks, Paulo for your help!
@nomuthetart     20 June, 2019
    Twitter nomuthetart NathanB from ESS@UW:
Paulo alerted us to a XSS vulnerability and when we had difficulty reproducing it walked us through his process which allowed us to patch it.
@anorwood     18 June, 2019
    Twitter anorwood Adam Norwood from The University of Texas School of Law:
Thanks for pointing out an XSS vulnerability in the markup of one of our applications. Good to have it patched up.
@JuniorTidal     18 June, 2019
    Twitter JuniorTidal Junior Tidal from NYCCT Library:
Thank you Paulo for sharing your expertise. It is much appreciated!
@mike_bobbitt     14 June, 2019
    Twitter mike_bobbitt Mike Bobbitt from
Paulo was very helpful in identifying vulnerabilities with our service - thanks!
@gerryswan2     7 June, 2019
    Twitter gerryswan2 Gerry Swan from University of Kentucky:
Thanks Paulo for your thorough feedback. It was an easy fix with your help and examples.
@filiperfreitas     4 June, 2019
    Twitter filiperfreitas Filipe Freitas from JM:
Thank you Paulo for detecting and helping us fix the vulnerabilities. Much appreciated.
@filiperfreitas     4 June, 2019
    Twitter filiperfreitas Rodrigo Freitas from JM:
Thank you for sharing your findings Paulo and the way to correct them!

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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:191
Total reports on VIP sites:30
Total patched vulnerabilities:79
Recommendations received:8
Active since:12.03.2019

Open Bug Bounty Certificate

Researcher Certificate

Reported Vulnerabilities

All Submissions VIP Submissions

No posts in blog yet

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  Recent Recommendations

    23 November, 2023
Grace à Hatim_cf on a pu corrigé une faille mineure de sécurité.
    22 November, 2023
On behalf of our users on one of the pages hosted at, I'd like to thank Niko for his effort in finding and responsibly reporting an XSS vuln in one of our user's sites. The XSS was quickly patched after Niko's detailed report making the web a safer place again. Thanks!
    22 November, 2023
Ronald identified an XSS vulnerability on our site which could be fixed fast. Thanks for the provided information!
    4 November, 2023
Thank you for fixing the XSS vulnerability
    13 October, 2023
I am highly recommending Sajid for web assessments and penetrating testing. Sajid was highly professional and detailed in t heir approach towards finding vulnerabilities.