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.
| Reporter | Title | Published | Views | Family All 183 |
|---|---|---|---|---|
 | CVE-2023-4583 | 11 Sep 202308:02 | – | alpinelinux |
 | Important: firefox security update | 4 Sep 202300:00 | – | almalinux |
| Important: thunderbird security update | 4 Sep 202300:00 | – | almalinux |
| Important: thunderbird security update | 4 Sep 202300:00 | – | almalinux |
| Important: firefox security update | 4 Sep 202300:00 | – | almalinux |
 | Astra Linux – Vulnerability in Firefox and Thunderbird | 20 May 202605:53 | – | astralinux |
 | The vulnerability of the privacy modes of Mozilla Firefox, Firefox ESR, and the email client Thunderbird, related to the lack of protection for service data, allows attackers to gain access to confidential information. | 5 Sep 202300:00 | – | bdu_fstec |
 | CentOS 7 : thunderbird (RHSA-2023:4945) | 22 Dec 202300:00 | – | nessus |
| CentOS 7 : firefox (RHSA-2023:5019) | 22 Dec 202300:00 | – | nessus |
| Fedora 37 : firefox (2023-80549d73b9) | 2 Sep 202300:00 | – | nessus |
10
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03 Sep 2025 21:50Current
7High risk
Vulners AI Score7
CVSS 3.17.5
EPSS0.00673
SSVC