CVE-2015-0833: Mozilla Firefox

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

Multiple untrusted search path vulnerabilities in updater.exe in Mozilla Firefox before 36.0, Firefox ESR 31.x before 31.5, and Thunderbird before 31.5 on Windows, when the Maintenance Service is not used, allow local users to gain privileges via a Trojan horse DLL in (1) the current working directory or (2) a temporary directory, as demonstrated by bcrypt.dll.

Affected products

• Mozilla Firefox: up to and including 35.0.1; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …
• Mozilla Firefox ESR: version 31.1 only; version 31.2 only; version 31.3 only; version 31.4 only; version 31.5 only
• Mozilla Thunderbird: up to and including 31.4; version 31.0 only; version 31.1.2 only; version 31.2 only; version 31.3 only
• Opensuse Evergreen: version 11.4 only
• Opensuse Opensuse: version 13.1 only; version 13.2 only

Published 2015-02-25. Last modified 2026-06-17.