Open Bug Bounty selected among the
Top 5 Bug Bounty programs to watch
by The Hacker News

All Open Bug Bounty emails are sent only from domain being digitally signed. All others are fake. Learn more.
For security researchers
Report a Vulnerability
Submit, help fixing, get kudos.
For website owners
Start a Bug Bounty
Run your bounty program for free.
1,246,329 coordinated disclosures
899,023 fixed vulnerabilities
1,584 bug bounty programs, 3,148 websites
28,425 researchers, 1,442 honor badges

rj01 | Security Researcher Profile

Security researcher rj01 has already helped fix 1021 vulnerabilities.

Researcher reputation:  160

Real name:
Roy Jansen

About me:
Security Is An Illusion

Contact email:
E: [email protected]

Alternative Contacts:
Twitter DM:

Certifications & Diplomas:
Certifications & Diplomas can be found here:-

Experience in Application Security
over 5 years

Award / Bug Bounty I prefer:
Bounty, Swag. Responsible Disclosure, its all about the Acknowledgment/Recognition. Understand that a security researcher/reporter does it all for you and your users 'online security'. We protect!

Halls of Fame:
Halls Of Fame can be found here:-

Follow me on:

Ethics and Rules:
Roy Jansen 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

@sinoderf     28 August, 2018
    Twitter sinoderf Fred from Neckermann:
Roy has sent us, using the ISO 29147 guidelines, a very clear and actionable vulnerability report which made it easy to reproduce and fix the issue.
This was a good example of an ethical and coordinated responsible disclosure process.
Roy, thanks for the effort you put in to it.
@TVblik     3 July, 2017
    Twitter TVblik TVblik from TVblik:
Roy send us vulnerability report by mail, with an
very clear explanation. So we could fix the vulnerability immediately! Beside that the mailcommunication with Roy is very pleasant. Thank you Roy!
@cloudsplitter     16 June, 2017
    Twitter cloudsplitter Russell Smith from AMA Multimedia:
Roy sent us a report about an XSS vulnerability that affected a large portion of our sites. He was really clear and detailed in his explanation of the problem. It was an easy fix but a very important one that was overlooked by us. Awesome job!
@NIDHKU     2 February, 2017
    Twitter NIDHKU Emile Bijk from HKU:
Roy helps us to identify vulnerabilities in our online systems. Thanks to his notifications we are able to patch them.
@aartvdwerf     22 May, 2018
    Twitter aartvdwerf Aart from OI:
Thanks for letting us know about the XSS vulnerabilities. We appreciate the quick feedback.
@StephanFreeman     6 July, 2017
    Twitter StephanFreeman Stephan Freeman from Telegraph Media Group:
Roy contacted us about a couple of issues on our sites. He was very helpful and clear about the problems he found and we're grateful for the heads up.
@wobblymusic     30 May, 2017
    Twitter wobblymusic Jon from Track-Blaster:
Roy found a pair of xss vulnerabilities on our website. Thanks to his concise reports, we were able to fix the issues immediately.
@theodrick     15 May, 2017
    Twitter theodrick Theodric Young from WMBR-FM:
Roy found an XSS bug on our website. With his excellent report, we were able to fix the vulnerability. Thanks Roy!
@NotyJoey1     5 May, 2017
    Twitter NotyJoey1 Joe Oliveiro from VR Sumo:
You are amazing. Thanks for finding all these XSS issues on my site. It's greatly appreciated!
@maartenmedia     16 April, 2017
    Twitter maartenmedia Maarten from AVEQ:
Thanks Roy for the great report and proof you have sent us!
We have fixen the XSS leak easily due to the great explanation from Roy!

Shows the first 10 recommendations. See all.

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:1772
Total reports on VIP sites:275
Total patched vulnerabilities:1021
Recommendations received:13
Active since:15.11.2016
Top VIP Security Researcher Awards: Top VIP Security Researcher of the Week Top VIP Security Researcher of the Week

Open Bug Bounty Certificate

Researcher Certificate

Reported Vulnerabilities

All Submissions VIP Submissions

No posts in blog yet

  Latest Patched


  Latest Blog Posts

15.02.2022 by sepkatpro
Ultimate XSS Polyglot
11.11.2021 by mistry4592
The Most used Chrome Extensions are Used For Penetration Testing.
08.10.2021 by NNeuchi
How I Found My First Bug Reflected Xss On PIA.GOV.PH(Philippine Information Agency)
26.08.2021 by PyaePhyoThu98
eG Manager v7.1.2: Improper Access Control lead to Remote Code Execution (CVE-2020-8591)
14.07.2021 by Open Bug Bounty
Interview With Open Bug Bounty

  Recent Recommendations

@TiagoGuedesEGo1     20 June, 2022
    Twitter TiagoGuedesEGo1:
shashank_bhure made us aware of several security vulnerabilities that represented security flaws of several degrees and needed to be rectified.

It was a pleasure working with you and I hope we can work again in the future, Thank you!
@TiagoGuedesEGo1     15 June, 2022
    Twitter TiagoGuedesEGo1:
Hardik_850 made us aware of several security vulnerabilities that represented security flaws of several degrees and needed to be rectified.

It was a pleasure working with you and I hope we can work again in the future, Thank you!
@DeBuecher     3 June, 2022
    Twitter DeBuecher:
Peter was of good help
@salmankhan2016     26 May, 2022
    Twitter salmankhan2016:
thanyou security_helper5
@securityhelper5     26 May, 2022
    Twitter securityhelper5:
thank you for report