CVE-2023-4583
7.5
HIGH
CVSS 3.1
EPSS 0.15%
Description
When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
How to fix CVE-2023-4583
To remediate CVE-2023-4583, upgrade the affected package to a fixed version below.
- —upgrade to 115.2.0esr-1 or later
- —upgrade to 1:115.2.0-1 or later
Is CVE-2023-4583 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 115.2.0esr-1
- from 0, < 1:115.2.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |