CVE-2006-0884: Mozilla Thunderbird

High severity, CVSS 9.3. EPSS: 7.2% chance of exploitation in the next 30 days.

The WYSIWYG rendering engine ("rich mail" editor) in Mozilla Thunderbird 1.0.7 and earlier allows user-assisted attackers to bypass javascript security settings and obtain sensitive information or cause a crash via an e-mail containing a javascript URI in the SRC attribute of an IFRAME tag, which is executed when the user edits the e-mail.

Affected products

• Mozilla Thunderbird: up to and including 1.0.7; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2006-02-24. Last modified 2026-06-16.