CVE-2024-9398
5.3
MEDIUM
CVSS 3.1
EPSS 0.81%
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.
How to fix CVE-2024-9398
To remediate CVE-2024-9398, upgrade the affected package to a fixed version below.
- Debian/thunderbird—upgrade to 1:128.3.0esr-1 or later
Is CVE-2024-9398 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:128.3.0esr-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |