Adobe » Acrobat Reader : Security Vulnerabilities, CVEs, (XSS) CVSS score >= 5

The default configuration of Adobe Reader and Acrobat 9.x before 9.3, and 8.x before 8.2 on Windows and Mac OS X, does not enable the Enhanced Security feature, which has unspecified impact and attack vectors, related to a "script injection vulnerability," as demonstrated by Acrobat Forms Data Format (FDF) behavior that allows cross-site scripting (XSS) by user-assisted remote attackers.

Adobe Acrobat Reader Plugin before 8.0.0, and possibly the plugin distributed with Adobe Reader 7.x before 7.1.4, 8.x before 8.1.7, and 9.x before 9.2, when used with Internet Explorer, Google Chrome, or Opera, allows remote attackers to cause a denial of service (memory consumption) via a long sequence of # (hash) characters appended to a PDF URL, related to a "cross-site scripting issue."