RHSA-2025:8308 — Security Advisory

Red Hat Security Advisory: firefox security update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · May 29, 2025

Updated · June 28, 2026

Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.

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: thunderbird: Clickjacking vulnerability could have led to leaking saved payment card details (CVE-2025-5267)
firefox: thunderbird: Potential local code execution in ?Copy as cURL? command (CVE-2025-5264)
firefox: thunderbird: Memory safety bugs (CVE-2025-5268)
firefox: thunderbird: Script element events leaked cross-origin resource status (CVE-2025-5266)
firefox: thunderbird: Error handling for script execution was incorrectly isolated from web content (CVE-2025-5263)
firefox: thunderbird: Memory safety bug (CVE-2025-5269)

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.