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1,006,104 coordinated disclosures
628,908 fixed vulnerabilities
1,348 bug bounty programs, 2,698 websites
23,362 researchers, 1,318 honor badges

gdattacker | Security Researcher Profile

Security researcher gdattacker has already helped fix 428 vulnerabilities.

Researcher reputation:  690

Real name:
Gaurav Kumar

About me:
Gaurav Kumar, A Security Researcher From India Who Loves To Make The Web A Safer Place For Everybody By Reporting Any Security Vulnerability I Found Online. Contact Details Mentioned Below.

PayPal & Payoneer e-mail: [email protected]
BTC Address: 3P1tao8sycwbJmCPFkueJG4ErJg8zrkxbp

Contact email:
Gmail: [email protected] Twitter: Facebook:

Experience in Application Security
over 5 years

Award / Bug Bounty I prefer:
Paypal, Amazon card, BTC, Swags, Gifts. After all, it takes a lot of efforts and time to find Security Vulnerabilities :)

Halls of Fame:
Facebook, Google, Sony, United Nations Organisation, Pluralsight's, Envato, Abacus, Castbox, Jet, inflectra, CodePen, FanDuel,, JPmorganChase, ledger.. etc.

Follow me on:

Recommendations and Acknowledgements

@satcharts     24 September, 2019
    Twitter satcharts Peterson :
Thank you for helping make our website more secure.

We really appreciate it. Keep up the good work!
@jrkok     7 April, 2021
    Twitter jrkok Security team from
Thanks for the notification of a specific XSS vulnerability and the detailed background information.
@macports     7 April, 2021
    Twitter macports Rainer Müller from MacPorts:
Thank you for bringing an XSS issue on our site to our attention!
@cpweather     2 January, 2021
    Twitter cpweather Christian from
Thanks for your help in identifying security problem in my website code!
@kushidat     26 December, 2020
    Twitter kushidat Tatsuya Kushida from RIKEN BRC:
Thank you so much for suggesting the vulnerability. The prompt and detailed response helped solve the issues.
@studentdoctor     1 December, 2020
    Twitter studentdoctor Lee from studentdoctor:
Fantastic work by gdattacker, found errors on two of our sites that he helped us test following patching. Thanks!
@studentdoctor     26 November, 2020
    Twitter studentdoctor Lee from studentdoctor:
Identified two CVEs that we responded to immediately. Excellent and friendly communication. Highest recommendation!

Thank you!
@SNTech2     26 November, 2020
    Twitter SNTech2 Steve from Sharenet:
A big thank you for reporting the bug and providing all the information required to quickly fix the bug. Much appreciated and keep up the good work!
@AsictSoc     18 November, 2020
    Twitter AsictSoc Security Operation Center from Politecnico di Milano:
Dear gdattacker,

the SOC of Politecnico di Milano would like to thank you for disclosing us a XSS vulnerability on our infrastructure.
@SteffenBugenha1     18 November, 2020
    Twitter SteffenBugenha1 Steffen Bugenhagen from HeizPellets24:
Thank you for finding a another XSS vulnerability within our Application. The Response was also quick and detailed so it was easy to fix this quickly. Keep up the good work!

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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:1247
Total reports on VIP sites:66
Total patched vulnerabilities:428
Total vulnerabilities on Hold (Open Bug Bounty):140
Recommendations received:50
Active since:25.03.2019

Open Bug Bounty Certificate

Researcher Certificate

Reported Vulnerabilities

All Submissions VIP SubmissionsFeatured Submissions

No posts in blog yet

  Latest Patched


  Latest Blog Posts

25.05.2021 by 0xrocky
Google XSS Game
25.05.2021 by ShivanshMalik12
Testing for XSS (Cross Site Scripting)
25.05.2021 by darklotuskdb
Easy XSS On Mostly Educational Websites Via Moodle
25.04.2021 by ParanjpeSanmarg
Testing Subdomain Takeover Vulnerability
11.04.2021 by Open Bug Bounty
Better Notifications Mechanism

  Recent Recommendations

@darione90     19 June, 2021
    Twitter darione90:
Many thanks to garlet_marco for finding an XSS vulnerability on our website!
@RyanBoehm12     16 June, 2021
    Twitter RyanBoehm12:
Vighnesh Gupta was professional, considerate, and thorough in helping us resolve a security flaw on our website. He communicated with in a timely manner, and provided all necessary support to fix the issue. I highly recommend him.
@rus_cert     16 June, 2021
    Twitter rus_cert:
Thanks for informing us about the vulnerability and providing helpful details :-)
@Cyber91998806     16 June, 2021
    Twitter Cyber91998806:
He responded to my mails quickly and helped us how to fix the vulnerability in a professional way. I recommended this guy.
@contactsplus     15 June, 2021
    Twitter contactsplus:
Tuhin reported 3 valid vulnerabilities to us of severities High, Medium and Low.

He was very professional and helped us recreate the issues until we were able to verify.
He was awarded a bounty for his efforts.

Thank you Tuhin!

Contacts+ Security Team.