CVE-2023-25739: mozilla firefox Use After Free
CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2023-25739DEBIAN-CVE-2023-25739
Published 02-06-2023Last modified 09-01-2025
Vulnerability summary
CVE-2023-25739 is a high (CVSS 8.8) Use After Free vulnerability in mozilla firefox. EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 51.6% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (CVE.org)EPSS score
0.68%
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 32 · Related 10DLA-3319-1DLA-3324-1DSA-5350-1DSA-5355-1MGASA-2023-0056MGASA-2023-0057OPENSUSE-SU-2024:12713-1OPENSUSE-SU-2024:12753-1OPENSUSE-SU-2024:14572-1RHSA-2023:0805RHSA-2023:0806RHSA-2023:0807RHSA-2023:0808RHSA-2023:0809RHSA-2023:0810RHSA-2023:0811RHSA-2023:0812RHSA-2023:0817RHSA-2023:0818RHSA-2023:0819RHSA-2023:0820RHSA-2023:0821RHSA-2023:0822RHSA-2023:0823RHSA-2023:0824SUSE-SU-2023:0461-1SUSE-SU-2023:0466-1SUSE-SU-2023:0469-1SUSE-SU-2023:0599-1USN-5880-1USN-5943-1USN-6120-1
Timeline
- 02-06-2023PublishedVulnerability first disclosed.
- 09-01-2025Last modifiedVulnerability information updated.
Description
Module load requests that failed were not being checked as to whether or not they were cancelled causing a use-after-free in <code>ScriptLoadContext</code>. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
CVSS metrics
4 scores · 4 sources · 1 versionHigh 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.68%
Chance of exploitation in the next 30 days
Percentile
52%
Versus all other CVEs
30-day change
0.00 pp
From 0.68% on 19-09-2026
19-09-202619-10-2026
EPSS score0.68%
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< 110.0+build3-0ubuntu0.18.04.1 | < 110.0+build3-0ubuntu0.20.04.1
- mozjs102< 102.11.0-0ubuntu0.22.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
Mozilla3 products
- firefox≥ unspecified, < 110 | < 110.0
- firefox_esr≥ unspecified, < 102.8 | < 102.8
- thunderbird≥ unspecified, < 102.8 | < 102.8
Debian2 products
- firefox-esr< 102.8.0esr-1
- thunderbird< 1:102.8.0-1
3 vendors · 13 products
References
12 links- www.mozilla.org/security/advisories/mfsa2023-06/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2023-05/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2023-07/Vendor Advisory
