Back
CVE-2023-4583
Browsing Context potentially not cleared when closing Private Window
High7.5EPSS 0.69%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.69% · top 47% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected unspecified – < 117
- affected unspecified – < 115.2
- affected unspecified – < 115.2
References (4)
- https://bugzilla.mozilla.org/show_bug.cgi?id=1842030 (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-34/ (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-36/ (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-38/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-4583)Record last updated .