Description
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.
Scores
CVSS v3
4.3
EPSS
0.0030
EPSS Percentile
52.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1021
Status
published
Products (4)
mozilla/firefox
< 135.0
Mozilla/Firefox
135
mozilla/thunderbird
131.0 - 135.0
Mozilla/Thunderbird
135
Published
Feb 04, 2025
Tracked Since
Feb 18, 2026