CWE-79 Medium severity

XSS vulnerability in LinkedIn

XSS vulnerability in multiple LinkedIn Direct Web Remoting (DWR) endpoints via the c0-id parameter.

Original release date
March 2013
Discovered by
Vicente Aguilera Díaz
Severity
4.3 / 10 CVSS v2.0
Affected product
LinkedIn (www.linkedin.com)

Antecedentes

LinkedIn is a professional social networking platform with over 200 million users worldwide.

Description

The vulnerability allows for XSS injection via the "c0-id" parameter in multiple Direct Web Remoting (DWR) endpoints of LinkedIn's advertising system, including validateCreativeText, getBidSuggestion, validateClickThroughUrl, and others.

Business impact

A malicious user can access information stored in other users' cookies, potentially impersonating them and accessing their accounts.

Sistemas afectados

www.linkedin.com (endpoints /ads/dwr/exec/SasAjax.*)

Solución

LinkedIn has resolved all reported issues.

Calendario de divulgación

Mar 03, 2013 Vulnerability acquired by Internet Security Auditors.
Mar 11, 2013 Sent to the security team.
Jul 04, 2013 Initial vendor notification.
July 11, 2013 All reported issues resolved.

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 in-depth 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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