Infosec InstituteImage

Open Bug Bounty mentioned in the
Top 6 Bug Bounty programs of
2022 by the InfoSec Institute

The Hacker NewsImage

Open Bug Bounty named among the
Top 5 Bug Bounty programs of 2021
by The Hacker News

For security researchers
Report a Vulnerability
Submit, help fixing, get kudos.
For website owners
Start a Bug Bounty
Run your bounty program for free.
2,004,500 coordinated disclosures
1,709,855 fixed vulnerabilities
2,376 bug bounty programs, 4,400 websites
81,324 researchers, 1,944 honor badges

4websecurityTop-50 VIP Open Redirect Reporter Top Security Researcher of the MonthImage Top VIP Security Researcher of the Month | Security Researcher Profile


Security researcher 4websecurity has already helped fix 11602 vulnerabilities.



Researcher reputation:  110

Real name:
4websecurity

Contact email:
[email protected]

Alternative Contacts:
https://4websecurity.com

Halls of Fame:
- GOV.UK (vdp.cabinetoffice.gov.uk/thanks.txt)
- Etherscan.io (etherscan.io/bugbounty)
- CVE-2022-38553 (github.com/4websecurity/CVE-2022-38553)
- h1 (hackerone.com/4websecurity)

Follow me on:
Twitter

Ethics and Rules:
4websecurity 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

@uptheante     2 July, 2022
    Twitter uptheante Jan Intia from Affise:
Alex from 4websecurity was very helpful in making us aware of our website's vulnerability and also providing recommendation on how to patch it. They are the best at what they do. Great work and thank you again!
@BenjaminSponsor     11 May, 2023
    Twitter BenjaminSponsor Benjamin from Benjamin:
Thanks for making me aware Alex!
@DadadXXVIII     7 May, 2023
    Twitter DadadXXVIII Kix from ACB:
4WebSecurity discovered a vulnerability and quickly contacted us. Alex suggested a solution. Thank you very much.
@marcstorrs     5 May, 2023
    Twitter marcstorrs Marc from Evil Science:
Shout outs to Alex from 4websecurity for alerting me to a vulnerability in my shared hosting environment! Alex also went ahead and contacted the hosting company to alert them to the security issue in hopes of a quick patch roll out. Great work! Thank You!
@authornationtu1     14 July, 2022
    Twitter authornationtu1 Melody Ann from AuthorNation:
4WebSecurity found a vulnerability and let us know immediately. We needed some technical advice to solve it, which he provided. The fix was complete within 24hours. Much appreciated.
@amritanandh     14 July, 2022
    Twitter amritanandh Amrit Anandh from Cartimize:
Ilie from 4websecurity helped us discover a vulnerability on our website. They also helped us confirm the patch and made sure the website was secure. Super quick replies and very helpful. Thanks, Ilie.
@chrispugmire     10 July, 2022
    Twitter chrispugmire Chris Pugmire from NetWin Ltd:
Very helpful thanks for assisting us to resolve this problem quickly.
@LucaNardelli_IT     4 July, 2022
    Twitter LucaNardelli_IT Luca from Caricami:
Ilie from 4websecurity helped us discover a vulnerability in our website and his super quick responses allowed us to fix it. Great work and thank you!!

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
WEB SECURITY VETERAN
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

REPUTABLE Badge
FAMOUS Badge
GLOBALLY TRUSTED Badge
REPUTABLE
10+ Recommends
FAMOUS
25+ Recommends
GLOBALLY TRUSTED
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



Position in TOP-50 XSS Researchers№ 13 Reported 42714 vulnerable websites
Position in TOP-50 VIP XSS Researchers№ 33 Reported 634 vulnerable VIP websites
Position in TOP-50 Open Redirect ReportersNot yet there
Position in TOP-50 VIP Open Redirect ReportersNot yet there
Total reports:42913
Total reports on VIP sites:635
Total patched vulnerabilities:11602
Recommendations received:8
Active since:20.06.2022
Top Security Researcher Awards:Gold Star Top Security Researcher of the Month Gold Star Top Security Researcher of the Month
Top VIP Security Researcher Awards:Image Top VIP Security Researcher of the Month Image Top VIP Security Researcher of the Week Image Top VIP Security Researcher of the Week Image Top VIP Security Researcher of the Week Image Top VIP Security Researcher of the Week Image Top VIP Security Researcher of the Week

Open Bug Bounty Certificate


Researcher Certificate

Reported Vulnerabilities

All Submissions VIP SubmissionsFeatured Submissions

  Latest Patched

Image 05.09.2026 dom-home.me
Image 05.09.2026 web.caravan-rent.me
Image 05.09.2026 lola.dlib.me
Image 05.09.2026 my-ant.myds.me
Image 05.09.2026 njegos.dlib.me
Image 05.09.2026 multiverseplanet.ai
Image 04.09.2026 bookvoed.ru
Image 04.09.2026 gurufocus.com
Image 04.09.2026 livelib.ru
Image 04.09.2026 psychologies.ru

  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

    3 September, 2026
    Owen_Sinclair:
A valuable security report with a practical proof of concept and clear remediation guidance. We appreciated the professional approach from initial report through resolution.
    3 September, 2026
    Owen_Sinclair:
Professional security researcher with excellent communication. The reproduction steps were clear and the technical findings were presented in an easy-to-understand way.
    3 September, 2026
    Owen_Sinclair:
Strong attention to detail and responsible disclosure. The report highlighted the security impact clearly and helped us address the issue quickly.
    3 September, 2026
    Owen_Sinclair:
Great experience working with this researcher. The vulnerability report was concise, technically accurate, and included everything our development team needed to investigate the issue.
    3 September, 2026
    Owen_Sinclair:
A thorough researcher who provided useful technical details and a straightforward proof of concept. Very professional throughout the disclosure process.