CVE-2025-6429 Affecting firefox-x11 package, versions <0:128.12.0-1.el9_6.alma.1


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.07% (22nd percentile)

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  • Snyk IDSNYK-ALMALINUX9-FIREFOXX11-10575436
  • published2 Jul 2025
  • disclosed1 Jul 2025

Introduced: 1 Jul 2025

NewCVE-2025-6429  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 firefox-x11 to version 0:128.12.0-1.el9_6.alma.1 or higher.
This issue was patched in ALSA-2025:10072.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-x11 package and not the firefox-x11 package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an embed tag. This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

CVSS Base Scores

version 3.1