Cross-site Scripting (XSS) Affecting firefox package, versions *


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.99% (79th percentile)

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  • Snyk IDSNYK-RHEL10-FIREFOX-22213131
  • published5 Nov 2026
  • disclosed1 Jan 2019

Introduced: 1 Jan 2019

CVE-2019-17016  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 firefox.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

When pasting a &lt;style&gt; tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

CVSS Base Scores

version 3.1