CVE-2008-5503: Mozilla Firefox

Low severity, CVSS 2.6. EPSS: 1.5% chance of exploitation in the next 30 days.

The loadBindingDocument function in Mozilla Firefox 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 does not perform any security checks related to the same-domain policy, which allows remote attackers to read or access data from other domains via crafted XBL bindings.

Affected products

• Mozilla Firefox: up to and including 2.0.0.18; 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 1.1.13; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.5 only; …
• Mozilla Thunderbird: up to and including 2.0.0.18; version 2.0.0.0 only; version 2.0.0.4 only; version 2.0.0.5 only; version 2.0.0.6 only; version 2.0.0.9 only; …

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