RHSA-2025:10184 — Security Advisory
Red Hat Security Advisory: firefox security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · July 2, 2025
Updated · June 30, 2026
Topic
An update for firefox is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
-
firefox: Content-Disposition header ignored when a file is included in an embed or object tag (CVE-2025-6430)
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firefox: Use-after-free in FontFaceSet (CVE-2025-6424)
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firefox: Incorrect parsing of URLs could have allowed embedding of youtube.com (CVE-2025-6429)
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firefox: The WebCompat WebExtension shipped with Firefox exposed a persistent UUID (CVE-2025-6425)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.