Cross-site Scripting (XSS) Affecting firefox package, versions <0:140.5.0-1.el9_6


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.26% (18th percentile)

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  • Snyk IDSNYK-RHEL9-FIREFOX-13896071
  • published12 Nov 2025
  • disclosed11 Nov 2025

Introduced: 11 Nov 2025

CVE-2025-13018  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade RHEL:9 firefox to version 0:140.5.0-1.el9_6 or higher.
This issue was patched in RHSA-2025:21121.

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:9 relevant fixed versions and status.

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.

CVSS Base Scores

version 3.1