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CVE-2020-12391 Documents formed using data: URLs in an OBJECT element failed to inherit the CSP of the creating context

Description

Documents formed using data: URLs in an OBJECT element failed to inherit the CSP of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin. This vulnerability affects Firefox < 76.

Affected products and versions

Product Affected versions Fixed in
Firefox 76 earliest → < 76 76
The 2221 CVEs of Firefox →
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