CVE-2016-9903: Mozilla Firefox

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

Mozilla's add-ons SDK had a world-accessible resource with an HTML injection vulnerability. If an additional vulnerability allowed this resource to be loaded as a document it could allow injecting content and script into an add-on's context. This vulnerability affects Firefox < 50.1.

Affected products

• Mozilla Firefox: before 50.1 (fixed in 50.1)

Published 2018-06-11. Last modified 2026-06-17.