Description
By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if the application which implements that protocol handler is installed. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.
References (5)
Scores
CVSS v3
5.3
EPSS
0.0081
EPSS Percentile
74.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-203
Status
published
Products (4)
mozilla/firefox
< 131.0
mozilla/firefox_esr
< 128.3.0
mozilla/thunderbird
129.0 beta (6 CPE variants)
mozilla/thunderbird
< 128.3
Published
Oct 01, 2024
Tracked Since
Feb 18, 2026