Opera before 11.10 does not properly handle hidden animated GIF images, which allows remote attackers to cause a denial of service (CPU consumption) via an image file that triggers continual repaints.
http://www.opera.com/docs/changelogs/mac/1110/
http://www.opera.com/docs/changelogs/unix/1110/
http://www.opera.com/docs/changelogs/windows/1110/
Source: Mitre, NVD
Published: 2011-07-01
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium