CWE Code: 20
Vulnerability Type: privilege_escalation
CVSS Score: 9.3
CWE Name:  Improper Input Validation
Summary: sage 1.4.3 and earlier extension for firefox performs certain operations with chrome privileges, which allows remote attackers to execute arbitrary commands and perform cross-domain scripting attacks via the description tag of an rss feed. per info from the following advisory: 

http://www.net-security.org/secworld.php?id=8527

scored this cve cia:complete
Access Authentication: NONE
Access Complexity: MEDIUM
Access Vector: NETWORK
Impact (C/I/A): COMPLETE/COMPLETE/COMPLETE
Published Date: 2009-11-29
Last Modified Date: 2017-08-17