CVE-2005-2703: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

Firefox before 1.0.7 and Mozilla Suite before 1.7.12 allows remote attackers to modify HTTP headers of XML HTTP requests via XMLHttpRequest, and possibly use the client to exploit vulnerabilities in servers or proxies, including HTTP request smuggling and HTTP request splitting.

Affected products

• Mozilla Firefox: up to and including 1.0.6; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; …
• Mozilla Mozilla Suite: up to and including 1.7.11; version 1.7.6 only; version 1.7.7 only; version 1.7.8 only; version 1.7.10 only

Published 2005-09-23. Last modified 2026-06-16.