CWE-79 Medium severity

Multiple Reflected Cross-Site Scripting vulnerabilities in LinkedIn

Multiple reflected XSS vulnerabilities in LinkedIn affecting link previews, group discussions, group creation, and polls.

Original release date
December 2012
Discovered by
Eduardo García Melia
Severity
6.8 / 10 CVSS v2.0
Affected product
LinkedIn (www.linkedin.com)

Antecedentes

LinkedIn operates the world's largest professional network on the Internet, with more than 187 million members in over 200 countries and territories.

Description

Four distinct reflected XSS vulnerabilities affecting link attachment previews, group discussions, group discussion creation, and poll creation on LinkedIn, allowing attackers to inject malicious scripts.

Business impact

It allows for phishing attacks, credential theft via forged LinkedIn clone sites, and malware distribution through social engineering by exploiting user trust.

Sistemas afectados

www.linkedin.com and touch.www.linkedin.com

Solución

LinkedIn resolved all XSS issues on 07/11/2013.

Calendario de divulgación

Dec 17, 2012 Initial discovery.
Jan 20, 2013 Sent to the LinkedIn security team.
Feb 7, 2013 LinkedIn requests forwarding.
Feb 19, 2013 Updated shipment.
Feb 26, 2013 Correction confirmed.
Mar 10, 2013 Additional vulnerabilities reported.
July 11, 2013 All XSS issues resolved.
Sep 26, 2013 Public disclosure.

References

Sobre Internet Security Auditors

Company based in Spain and Colombia, specializing in web application auditing, network security, penetration testing, and compliance implementation and assessment. Our clients include some of the largest finance, telecommunications, insurance, and ICT companies. A vendor-independent provider with deep experience since 2001. Our R&D efforts include vulnerability research, collaboration on open security projects, whitepapers, and participation in industry events.

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