CVE-2015-0816: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 66.9% chance of exploitation in the next 30 days.

Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the ability to bypass the Same Origin Policy, as demonstrated by the resource: URL associated with PDF.js.

Affected products

• Mozilla Firefox: up to and including 31.5.3; up to and including 36.0.4
• Mozilla Thunderbird: up to and including 31.5

Published 2015-04-01. Last modified 2026-06-17.