Coordinated and Responsible Vulnerability Disclosure Free Bug Bounty Program 290,284 coordinated disclosures
163,047 fixed vulnerabilities
232,472 websites, 17,748 VIP websites
7,732 researchers, 6,915 subscribers

stfn | Security Researcher Profile


Security researcher stfn has already helped fix 368 vulnerabilities.



Researcher reputation:  40

How to contact me:
[email protected]

Recommendations and Acknowledgements

    9 July, 2018
     BarnabyWalters Barnaby from BW Musical Instruments:
Stefan found an XSS vulnerability on my personal site and, when asked about it, was very helpful and quick to respond with information about how to reproduce and fix the issue. Thanks a lot!

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Awards and Achievements


Number of Secured Websites

10+ Websites
50+ Websites
500+ Websites
WEB SECURITY VETERAN
1000+ Websites

Advanced Security Research

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

Outstanding Achievements

Secured OBB
OBB Advocate
Improved OBB

Commitment to Remediate and Patch

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

Recommendations and Recognition

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

Research Statistics



Total reports:3434
Total reports on VIP sites:26
Total patched vulnerabilities:368
Total vulnerabilities on Hold (Open Bug Bounty):145
Recommendations received:1
Active since:03.04.2018

Reported Vulnerabilities

All Submissions VIP Submissions

Domain Reported Status Type
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
27.08.2018
On Hold
Cross Site Scripting
25.08.2018
On Hold
Cross Site Scripting
25.08.2018
On Hold
Cross Site Scripting
25.08.2018
On Hold
Cross Site Scripting
25.08.2018
On Hold
Cross Site Scripting
25.08.2018
On Hold
Cross Site Scripting

  Latest Patched

      transfermarkt.com.tr
    Patched on 16.11.2018
      investagrams.com
    Patched on 16.11.2018
      roller.de
    Patched on 15.11.2018
      alfaconcursos.com.br
    Patched on 15.11.2018
      stern.de
    Patched on 15.11.2018
      valutakurser.dk
    Patched on 15.11.2018
      sberbank.ru
    Patched on 15.11.2018
      epson.co.uk
    Patched on 15.11.2018
      firstonetv.net
    Patched on 15.11.2018
      norwegian.com
    Patched on 15.11.2018

  Recent Recommendations

    16 November, 2018
     Honscha_Muenzen:
Thank you very much for your help!
    16 November, 2018
     mousepotatothet:
Thanks to your continuous support, sharing the security vulnerability, and keeping our cyber space secure.
    15 November, 2018
     corebox:
Thanks for responsibly reporting a security weakness on our website. We greatly appreciate you telling us about it.
    15 November, 2018
     corebox:
Thanks for responsibly reporting a security weakness on our website. We greatly appreciate you telling us about it.
    15 November, 2018
     corebox:
Thijs found a vulnerability on one of our websites and responsibly reported it. Many thanks for letting us know.