Adobe Systems Inc. is taking action to block a cross-site scripting vulnerability in Flash player that it said is being actively exploited by attackers.
Adobe said the vulnerability, rated as important, has been identified in Adobe Flash Player 10.3.181.16 and earlier versions for Windows, Macintosh, Linux and Solaris, and Adobe Flash Player 10.3.185.22 and earlier versions for Android.
The company advises users to upgrade to version 10.3.185.22. Android users will have to wait until later this week to be completely protected.
The universal cross-site scripting vulnerability (CVE-2011-2107) could be used to take actions on a user's behalf on any website or webmail provider, if the user visits a malicious website. Adobe said there are reports that the vulnerability is already being exploited in the wild in targeted attacks designed to trick users into clicking on a malicious link delivered in an email message.
The company recommends that users of Adobe Flash Player 10.3.181.16 and earlier versions for Windows, Macintosh, Linux and Solaris, should update to Adobe Flash Player 10.3.181.22 (10.3.181.23 for ActiveX).
Adobe added that it is still investigating any impact to the Authplay.dll component that ships with Adobe Reader and Acrobat X (10.0.2) and earlier 10.x and 9.x versions of Adobe Reader and Acrobat for Windows and Macintosh operating systems. The company says it is not aware of any attacks targeting Adobe Reader or Acrobat in the wild.