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742,962 coordinated disclosures
436,917 fixed vulnerabilities
1147 bug bounties with 2,199 websites
20,617 researchers, 1257 honor badges

Oc3f Top VIP Security Researcher of the Month | Security Researcher Profile


Security researcher Oc3f has already helped fix 900 vulnerabilities.



Researcher reputation:  50

Real name:
Tadj Youssouf

About me:
Independent Security Researcher
Listed in many HoF: Google , Facebook, Microsoft, Mozilla CVE-2018-5176, Apple , bitdefender, Sony, AT&T, Western union, eBay, ...worked also as consultant for a lot of online banks under NDA contracts.

How to contact me:
[email protected]

Experience in Application Security
3-5 years

Halls of Fame:
Google : "tadj youssouf"

Recommendations and Acknowledgements

@xmajox     6 September, 2016
    Twitter xmajox Rodrigo from GetYourGuide:
Oc3f has helped us identify and fix a vulnerability with our platform. He was respectful and a pleasure to deal with. Keep up the good work!
@DIMDTM     20 November, 2017
    Twitter DIMDTM Driss from Dimelo:
Merci pour cette remontée de faille, nous avons pu la fixer rapidement !
@CorentinDIDIEUX     16 August, 2017
    Twitter CorentinDIDIEUX CorentinD from FitnessBoutique:
Merci Oc3f pour la remontée d'information ! :)
@TristanGuiheux     28 December, 2016
    Twitter TristanGuiheux Tristan Guiheux from Personal Recommendation:
0c3f has helped us many times to find and fix some issues on web sites we're protecting. This kind of help is greatly appreciated from a security perspective. This way we can improve ourselves and protect our customers. Thanks again in my name.
@SACHAVUKOVIC     1 August, 2016
    Twitter SACHAVUKOVIC Sacha_VUK from VIDAL:
Oc3f have find an issue on our web site, thanks for your works and help to fix it quickly !

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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
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



Total reports:1373
Total reports on VIP sites:314
Total patched vulnerabilities:900
Recommendations received:5
Active since:03.05.2016
Top Security Researcher Awards:Gold Star Top Security Researcher of the Month
Top VIP Security Researcher Awards: Top VIP Security Researcher of the Week Top VIP Security Researcher of the Week Top VIP Security Researcher of the Week

Open Bug Bounty Certificate


Researcher Certificate



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Reported Vulnerabilities

All Submissions VIP SubmissionsFeatured Submissions

  Latest Patched

 20.01.2021 4gamer.net
 20.01.2021 splunk.com
 20.01.2021 tirebouchon.me
 20.01.2021 rand.org
 20.01.2021 herbalife.am
 19.01.2021 infomaniak.com
 19.01.2021 gs1.org
 19.01.2021 embedsocial.com
 19.01.2021 gamasutra.com
 19.01.2021 b92.net

  Latest Blog Posts

25.12.2020 by _Y000_
How to bypass mod_security (WAF)
10.12.2020 by _Y000_
sql injection to bypass Mod_Security
10.12.2020 by _Y000_
Create encoded sql payloads
26.10.2020 by _r00t1ng_
Bypass Addslashes using Multibyte Character
26.10.2020 by _r00t1ng_
One Payload to Inject them all - MultiQuery Injection

  Recent Recommendations

@yuhiguchi1     20 January, 2021
    Twitter yuhiguchi1:
We appliciate your help with the vulnerability.
The response to inquiries was quick, which was very helpful.
@anTon_x3     20 January, 2021
    Twitter anTon_x3:
Thank you for finding security issues on my website! keep it up!
@rantoniazzi     19 January, 2021
    Twitter rantoniazzi:
Thanks for pointing out a public phpinfo(). Very fast contact.
@driesvanhaver     19 January, 2021
    Twitter driesvanhaver:
We were informed of a vulnerability. Thank you to Praveen for telling us it existed.
@snowdarkz     19 January, 2021
    Twitter snowdarkz:
Thank you very much for the help with the vulnerability. Very fast contact.