CVE-2023-6863
8.8
HIGH
CVSS 3.1
EPSS 0.51%
Description
The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
How to fix CVE-2023-6863
To remediate CVE-2023-6863, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 115.6.0esr-1~deb11u1 or later
Is CVE-2023-6863 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 115.6.0esr-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |