CVE-2008-2800: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 2% chance of exploitation in the next 30 days.

Mozilla Firefox before 2.0.0.15 and SeaMonkey before 1.1.10 allow remote attackers to bypass the Same Origin Policy and conduct cross-site scripting (XSS) attacks via vectors involving (1) an event handler attached to an outer window, (2) a SCRIPT element in an unloaded document, or (3) the onreadystatechange handler in conjunction with an XMLHttpRequest.

Affected products

• Mozilla Firefox: up to and including 2.0.0.14; version 2.0 only; version 2.0.0.1 only; version 2.0.0.2 only; version 2.0.0.3 only; version 2.0.0.4 only; …
• Mozilla Seamonkey: up to and including 1.1.9; version 1.1 only; version 1.1.2 only; version 1.1.3 only; version 1.1.4 only; version 1.1.5 only; …

Published 2008-07-07. Last modified 2026-06-16.