CVE-2013-1673: Mozilla Firefox

Medium severity, CVSS 6.9. EPSS: 0.3% chance of exploitation in the next 30 days.

The Mozilla Updater in Mozilla Firefox before 21.0 on Windows does not properly maintain Mozilla Maintenance Service registry entries in certain situations involving upgrades from older Firefox versions, which allows local users to gain privileges by leveraging write access to a "trusted path."

Affected products

• Mozilla Firefox: up to and including 20.0.1; version 19.0 only; version 19.0.1 only; version 19.0.2 only; version 20.0 only

Published 2013-05-16. Last modified 2026-06-16.