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Open Bug Bounty ID: OBB-98549

Security Researcher dim0k Helped patch 3381 vulnerabilities
Received 7 Coordinated Disclosure badges
Received 21 recommendations
, a holder of 7 badges for responsible and coordinated disclosure, found a security vulnerability affecting addthis.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:addthis.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 3381 vulnerabilities
Received 7 Coordinated Disclosure badges
Received 21 recommendations
Remediation Guide:OWASP XSS Prevention Cheat Sheet

Vulnerable URL:

Screenshot: addthis.com  vulnerability

Mirror: Click here to view the mirror

Coordinated Disclosure Timeline

Vulnerability Reported:31 October, 2015 16:35 GMT
Vulnerability Verified:31 October, 2015 16:37 GMT
Website Operator Notified:31 October, 2015 16:37 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]:
31 October, 2015 16:37 GMT
Vulnerability Fixed:13 January, 2016 18:42 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.21 November, 2015 16:35 GMT

For Website Operators and Owners

Please contact the researcher directly to get the vulnerability details. The researcher may also help you fix the vulnerability and advice on how to prevent similar issues.
For remediation best practices, please 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.

addthis.com

Website Overview

Alexa Global Rank:256
SSL/TLS Server Test:N/A    
Web Server Security Test:N/A    
Malware Test:Click here
Domain Health Report:Click here

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