CVE-2008-5511: Canonical Ubuntu Linux

Medium severity, CVSS 4.3. EPSS: 1.9% chance of exploitation in the next 30 days.

Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 allows remote attackers to bypass the same origin policy and conduct cross-site scripting (XSS) attacks via an XBL binding to an "unloaded document."

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 7.10 only; version 8.04 only; version 8.10 only
• Debian Debian Linux: version 4.0 only; version 5.0 only
• Mozilla Firefox: from 2.0, before 2.0.0.19 (fixed in 2.0.0.19); from 3.0, before 3.0.5 (fixed in 3.0.5)
• Mozilla Seamonkey: from 1.0, before 1.1.14 (fixed in 1.1.14)
• Mozilla Thunderbird: from 2.0, before 2.0.0.19 (fixed in 2.0.0.19)

Published 2008-12-17. Last modified 2026-06-16.