CVE-2025-14331: mozilla firefox Origin Validation Error
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-14331DEBIAN-CVE-2025-14331CGA-cqj3-hv55-mm76CGA-rw4j-rh9c-qxpqCGA-4hcr-g58w-hj6rCGA-xfq8-r3pv-mjw8
Published 09-12-2025Last modified 13-04-2026
Vulnerability summary
CVE-2025-14331 is a medium (CVSS 6.5) Origin Validation Error vulnerability in mozilla firefox. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 7.7% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.19%
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 40 · Related 11DLA-4401-1DLA-4405-1DSA-6078-1DSA-6081-1MGASA-2025-0328MGASA-2025-0329OPENSUSE-SU-2025:15809-1OPENSUSE-SU-2025:15813-1OPENSUSE-SU-2025:15814-1OPENSUSE-SU-2026:20014-1OPENSUSE-SU-2026:20046-1RHSA-2025:23034RHSA-2025:23035RHSA-2025:23128RHSA-2025:23856RHSA-2026:0003RHSA-2026:0004RHSA-2026:0005RHSA-2026:0006RHSA-2026:0007RHSA-2026:0013RHSA-2026:0014RHSA-2026:0015RHSA-2026:0016RHSA-2026:0017RHSA-2026:0018RHSA-2026:0019RHSA-2026:0020RHSA-2026:0021RHSA-2026:0022RHSA-2026:0023RHSA-2026:0024RHSA-2026:0025RHSA-2026:0026RHSA-2026:0124RHSA-2026:0127SUSE-SU-2025:4396-1SUSE-SU-2025:4397-1SUSE-SU-2025:4424-1SUSE-SU-2026:20031-1CGA-3PHJ-4PWP-FRP9USN-7991-1
Timeline
- 09-12-2025PublishedVulnerability first disclosed.
- 13-04-2026Last modifiedVulnerability information updated.
Description
Same-origin policy bypass in the Request Handling component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
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
0.19%
Chance of exploitation in the next 30 days
Percentile
8%
Versus all other CVEs
30-day change
0.00 pp
From 0.19% on 19-09-2026
19-09-202619-10-2026
EPSS score0.19%
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
- mozjs102All versions (No fix recorded)
- mozjs115All versions (No fix recorded)
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
Chainguard2 products
- firefox< 140.6-r0
- firefox-esr< 140.6-r0
Debian2 products
- firefox-esr< 140.6.0esr-1~deb12u1 | < 140.6.0esr-1~deb13u1 | < 140.6.0esr-1
- thunderbird< 1:140.6.0esr-1~deb12u1 | < 1:140.6.0esr-1~deb13u1 | < 1:140.6.0esr-1
Mozilla2 products
- firefox< 115.31.0 | < 146.0 | ≥ 116.0, < 140.6.0
- thunderbird< 140.6.0 | < 146.0
Wolfi1 product
- firefox< 140.6-r0
5 vendors · 15 products
