CVE-2023-4583: mozilla firefox
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2023-4583DEBIAN-CVE-2023-4583CGA-53h7-w9jp-46c4CGA-cf97-xj8w-4c3f
Published 11-09-2023Last modified 18-12-2025
Vulnerability summary
CVE-2023-4583 is a high (CVSS 7.5) vulnerability in mozilla firefox. EPSS estimates a 0.69% chance of exploitation in the next 30 days, higher than 51.7% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.69%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 25 · Related 10MGASA-2023-0266OPENSUSE-SU-2024:13176-1OPENSUSE-SU-2024:13202-1OPENSUSE-SU-2024:14572-1RHSA-2023:4945RHSA-2023:4946RHSA-2023:4947RHSA-2023:4948RHSA-2023:4949RHSA-2023:4950RHSA-2023:4951RHSA-2023:4952RHSA-2023:4954RHSA-2023:4955RHSA-2023:4956RHSA-2023:4957RHSA-2023:4958RHSA-2023:4959RHSA-2023:5019SUSE-SU-2023:3519-1SUSE-SU-2023:3559-1SUSE-SU-2023:3562-1SUSE-SU-2023:3664-1USN-6320-1USN-6405-1CGA-P6R3-MQ89-JJW3
Timeline
- 11-09-2023PublishedVulnerability first disclosed.
- 18-12-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NSourcesAll 5 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
0.69%
Chance of exploitation in the next 30 days
Percentile
52%
Versus all other CVEs
30-day change
0.00 pp
From 0.69% on 19-09-2026
19-09-202619-10-2026
EPSS score0.69%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu8 products
- firefox< 117.0+build2-0ubuntu0.20.04.1
- mozjs102All versions (No fix recorded)
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
Mozilla3 products
- firefox≥ unspecified, < 117 | < 117.0
- firefox_esr≥ unspecified, < 115.2 | < 115.2
- thunderbird≥ unspecified, < 115.2 | < 115.2
Debian2 products
- firefox-esr< 115.2.0esr-1
- thunderbird< 1:115.2.0-1
Chainguard1 product
- firefox-esr< 117.0-r0
4 vendors · 14 products
