Improper Restriction of Rendered UI Layers or Frames Affecting firefox package, versions <135.0-r0


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.36% (29th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-WOLFILATEST-FIREFOX-15384184
  • published4 Mar 2026
  • disclosed4 Feb 2025

Introduced: 4 Feb 2025

CVE-2025-1019  (opens in a new tab)
CWE-1021  (opens in a new tab)

How to fix?

Upgrade Wolfi firefox to version 135.0-r0 or higher.

NVD Description

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

The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.

CVSS Base Scores

version 3.1