Description
There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
References (8)
Scores
CVSS v3
6.5
EPSS
0.0003
EPSS Percentile
8.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-591
Status
published
Products (8)
mozilla/firefox
< 115.29.0
mozilla/firefox
< 144.0
Mozilla/Firefox
115.29 - 115.*
Mozilla/Firefox
140.4 - 140.*
Mozilla/Firefox
144
mozilla/thunderbird
< 140.4.0
Mozilla/Thunderbird
140.4 - 140.*
Mozilla/Thunderbird
144
Published
Oct 14, 2025
Tracked Since
Feb 18, 2026