Vulnerabilities in SharePoint Could Allow Elevation of Privilege

Description

A cross-site scripting and elevation of privilege vulnerability exists in SharePoint allows attacker-controlled JavaScript to run in the context of the user clicking a link. This is an elevation of privilege vulnerability as it allows an anonymous attacker to potentially issue SharePoint commands in the context of an authenticated user on the site.

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Impact
Malicious users may inject JavaScript, VBScript, ActiveX, HTML or Flash into a vulnerable application to fool a user in order to gather data from them. An attacker can steal the session cookie and take over the account, impersonating the user. It is also possible to modify the content of the page presented to the user.

Recommendation
Upgrade SharePoint to the latest version.

References
Microsoft Security Bulletin MS12-050