CVE-2005-0590: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 1.7% chance of exploitation in the next 30 days.

The installation confirmation dialog in Firefox before 1.0.1, Thunderbird before 1.0.1, and Mozilla before 1.7.6 allows remote attackers to use InstallTrigger to spoof the hostname of the host performing the installation via a long "user:pass" sequence in the URL, which appears before the real hostname.

Affected products

• Mozilla Firefox: version 0.8 only; version 0.9 only; version 0.9.1 only; version 0.9.2 only; version 0.9.3 only; version 0.10 only; …
• Mozilla Mozilla: version 1.3 only; version 1.4 only; version 1.4.1 only; version 1.5 only; version 1.5.1 only; version 1.6 only; …
• Mozilla Thunderbird: version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; version 0.6 only; …

Published 2005-05-02. Last modified 2026-06-16.