CVE-2008-4065: Canonical Ubuntu Linux

Medium severity, CVSS 4.3. EPSS: 4.1% chance of exploitation in the next 30 days.

Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12 allow remote attackers to bypass cross-site scripting (XSS) protection mechanisms and conduct XSS attacks via byte order mark (BOM) characters that are removed from JavaScript code before execution, aka "Stripped BOM characters bug."

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 7.04 only; version 7.10 only; version 8.04 only
• Debian Debian Linux: version 4.0 only
• Mozilla Firefox: before 2.0.0.17 (fixed in 2.0.0.17); from 3.0, before 3.0.2 (fixed in 3.0.2)
• Mozilla Seamonkey: before 1.1.12 (fixed in 1.1.12)
• Mozilla Thunderbird: before 2.0.0.17 (fixed in 2.0.0.17)

Published 2008-09-24. Last modified 2026-06-16.