CVE-2019-17000: Mozilla Firefox

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

An object tag with a data URI did not correctly inherit the document's Content Security Policy. This allowed a CSP bypass in a cross-origin frame if the document's policy explicitly allowed data: URIs. This vulnerability affects Firefox < 70.

Affected products

• Mozilla Firefox: before 70.0 (fixed in 70.0)

Published 2020-01-08. Last modified 2026-06-17.