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typeform.com Cross Site Scripting vulnerability
Open Bug Bounty ID: OBB-186441

Security Researcher dim0k Helped patch 3602 vulnerabilities
Received 7 Coordinated Disclosure badges
Received 21 recommendations
, a holder of 7 badges for responsible and coordinated disclosure, found a security vulnerability affecting typeform.com website and its users.

Following coordinated and responsible vulnerability disclosure guidelines of the ISO 29147 standard, Open Bug Bounty has:

      a. verified the vulnerability and confirmed its existence;
      b. notified the website operator about its existence.

Affected Website:typeform.com  
Open Bug Bounty Program:Create your bounty program now. It's open and free.
Vulnerable Application:Custom Code
Vulnerability Type:XSS (Cross Site Scripting) / CWE-79
CVSSv3 Score:6.1 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N]
Discovered and Reported by:dim0k Helped patch 3602 vulnerabilities
Received 7 Coordinated Disclosure badges
Received 21 recommendations
Remediation Guide:OWASP XSS Prevention Cheat Sheet

Vulnerable URL:

Mirror: Click here to view the mirror

Coordinated Disclosure Timeline

Vulnerability Reported:14 October, 2016 09:24 GMT
Vulnerability Verified:14 October, 2016 09:27 GMT
Website Operator Notified:14 October, 2016 09:27 GMT
a. Using publicly available security contacts
b. Using Open Bug Bounty notification framework
c. Using security contacts provided by the researcher
Public Report Published
[without any technical details]:
14 October, 2016 09:27 GMT
Vulnerability Fixed:19 December, 2016 08:54 GMT
Public Disclosure:  A security researcher can delete the report before public disclosure, afterwards the report cannot be deleted or modified anymore. The researcher can also postpone public disclosure date as long as reasonably required to remediate the vulnerability.6 January, 2017 09:24 GMT

For Website Operators and Owners

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For remediation best practices, please also refer to OWASP remediation guidelines. More information about coordinate and responsible disclosure on Open Bug Bounty is available here.

DISCLAIMER: As a non-profit project, Open Bug Bounty never acts as an intermediary between website owners and security researchers. Our role is strictly limited to independent verification of the reports and proper notification of website owners by all available means.

typeform.com

Website Overview

Alexa Global Rank:2,026
SSL/TLS Server Test:A+    View Results
Web Server Security Test:N/A    
Malware Test:Click here
Domain Health Report:Click here

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  Recent Recommendations

    18 February, 2020
     Travelmath:
Great job finding a vulnerability. I have fixed the issue now, thanks for your help!
    18 February, 2020
     giroud_francois:
Thanks for notifying flaw, and for the answers ! Your support on fixing the issues was helpful... Friendly contact.
    17 February, 2020
     bigwavedave_ca:
Many thanks to k0t for finding and reporting the XSS vulnerability on my website.
    17 February, 2020
     BountyNeuvoo:
Dear,

Thank you for participating in our responsible disclosure program.

You helped us to solve a security vulnerability by informing us directly and delivering comprehensible examples.

We greatly appreciate your assistance in helping us maintain the security of our services.

Best regards
    17 February, 2020
     Sixten591:
Thanks a lot for your help.
Really grateful