CVE-2025-1013: mozilla firefox Race Condition
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-1013DEBIAN-CVE-2025-1013CGA-9gmc-hww4-7rmwCGA-q46x-xxjg-29j9CGA-7cmm-37jp-fxj5CGA-g23x-w8c8-52c5
Published 04-02-2025Last modified 13-04-2026
Vulnerability summary
CVE-2025-1013 is a medium (CVSS 6.5) Race Condition vulnerability in mozilla firefox. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.33%
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 33 · Related 10DLA-4044-1DLA-4045-1DSA-5858-1DSA-5861-1MGASA-2025-0045MGASA-2025-0048OPENSUSE-SU-2025:14727-1OPENSUSE-SU-2025:14730-1OPENSUSE-SU-2025:14731-1RHSA-2025:1066RHSA-2025:1132RHSA-2025:1133RHSA-2025:1135RHSA-2025:1136RHSA-2025:1137RHSA-2025:1138RHSA-2025:1139RHSA-2025:1140RHSA-2025:1184RHSA-2025:1283RHSA-2025:1292RHSA-2025:1317RHSA-2025:1318RHSA-2025:1319RHSA-2025:1339RHSA-2025:1340RHSA-2025:1341RHSA-2025:1348SUSE-SU-2025:0374-1SUSE-SU-2025:0391-1SUSE-SU-2025:0405-1USN-7263-1USN-7663-1CGA-6QVP-5G48-6FPVCGA-6VVP-PM22-5FH9
Timeline
- 04-02-2025PublishedVulnerability first disclosed.
- 13-04-2026Last modifiedVulnerability information updated.
Description
A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
CVSS metrics
6 scores · 6 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NSourcesAll 6 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- OSV · WolfiEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- OSV · ChainguardEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS trend
Probability
0.33%
Chance of exploitation in the next 30 days
Percentile
24%
Versus all other CVEs
30-day change
0.00 pp
From 0.33% on 19-09-2026
19-09-202619-10-2026
EPSS score0.33%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu9 products
- firefox< 135.0+build2-0ubuntu0.20.04.1
- mozjs102All versions (No fix recorded)
- mozjs115All versions (No fix recorded)
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
Chainguard2 products
- firefox< 135.0-r0
- firefox-esr< 128.7.0-r0
Debian2 products
- firefox-esr< 128.7.0esr-1~deb12u1 | < 128.7.0esr-1
- thunderbird< 1:128.7.0esr-1~deb12u1 | < 1:128.7.0esr-1
Mozilla2 products
- firefox< 128.7.0 | < 135.0
- thunderbird< 128.7.0 | ≥ 129.0, < 135.0
Wolfi1 product
- firefox< 135.0-r0
5 vendors · 16 products
