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544,498 coordinated disclosures
349,735 fixed vulnerabilities
819 bug bounties with 1,599 websites
16,802 researchers, 1136 honor badges

mat | Security Researcher Profile


Security researcher mat has already helped fix 12 vulnerabilities.



Researcher reputation:  20

Real name:
cosmo

About me:
Professional Information Security Analyst for a large company, earned two degrees in CS, worked in academia, science and tech enthusiast.


Don't be hesitant reach out to me I don't bite, let's see those vulnerabilities closed.

How to contact me:
Either drop me a mail at: [email protected]

Experience in Application Security
over 5 years

Award / Bug Bounty I prefer:
Keep in mind, helping you, fixing your problems does take time and is work, thus payment would be appreciated.
If you're a small business and low on funds, swag and/or thanks on Twitter :)

Recommendations and Acknowledgements

    8 May, 2019
     iGopherFr Audrey from iGopher:
He found an XSS security flaw on our website that we did not notice despite our security tests. I recommend Mat without hesitation!

Please login via Twitter to add a recommendation

Honor Badges


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

Distinguished Blog Author

1 Post
3 Posts
5+ Posts

Research Statistics



Total reports:42
Total reports on VIP sites:11
Total patched vulnerabilities:12
Recommendations received:1
Active since:20.04.2019



No posts in blog yet


Reported Vulnerabilities

All Submissions VIP Submissions

Domain Reported Status Type
31.05.2019
unpatched
Cross Site Scripting
31.05.2019
unpatched
Cross Site Scripting
31.05.2019
unpatched
Cross Site Scripting
30.05.2019
unpatched
Cross Site Scripting
21.05.2019
unpatched
Cross Site Scripting
21.05.2019
patched
Cross Site Scripting
21.05.2019
unpatched
Cross Site Scripting
20.05.2019
patched
Cross Site Scripting
20.05.2019
unpatched
Cross Site Scripting
20.05.2019
unpatched
Cross Site Scripting
19.05.2019
patched
Cross Site Scripting
19.05.2019
patched
Cross Site Scripting
18.05.2019
unpatched
Cross Site Scripting
18.05.2019
unpatched
Cross Site Scripting
17.05.2019
unpatched
Cross Site Scripting
17.05.2019
unpatched
Cross Site Scripting
17.05.2019
patched
Cross Site Scripting
16.05.2019
patched
Cross Site Scripting
16.05.2019
patched
Cross Site Scripting
16.05.2019
unpatched
Cross Site Scripting

  Latest Patched

 15.07.2020 t3n.de
 14.07.2020 milb.com
 14.07.2020 rawabi.ps
 13.07.2020 valuecoders.com
 13.07.2020 gamemeca.com
 13.07.2020 jumkak.com
 13.07.2020 tingroom.com
 13.07.2020 conjugacao.com.br
 13.07.2020 biphim.tv
 13.07.2020 app.ptuk.edu.ps

  Latest Blog Posts

24.06.2020 by Gkexamquiz
How to Find Contacts To Report Bugs & Security Vulnerabilities | Bug Bounty Tutorials 2020
24.06.2020 by 0xcrypto
Improper Access Control - Generic: Unrestricted access to any "connected pack" on docs in coda.io
04.04.2020 by Rando02355205
(Alibaba) message.alibaba.com [IDOR] - [Bug Bounty]
12.03.2020 by Rando02355205
(Paypal) www.paypal.com [CSP High Level] - [XSS Reflected] - [Bug Bounty] - [Write Up]
08.03.2020 by CybeReports
JDECO.net XSS Vulnerability| CybeReports

  Recent Recommendations

    14 July, 2020
     tnyaritm:
Many thanks for your efforts to report the vulnerability and helped us to fix it. I recommend this researcher!
    13 July, 2020
     SFgenealogy:
Appreciate your discovery and notification of a bug so that we can increase our security!
    10 July, 2020
     Cajun_Lyrics:
Thank you very much for letting me know about the vulnerabilities on my website, It is really appreciated!
    10 July, 2020
     SNTech2:
A big thanks for notifying us of the bug! Much appreciated.
    10 July, 2020
     SNTech2:
A big thanks for notifying us of the bug! Much appreciated.