CVE-2025-1934: mozilla firefox
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-1934DEBIAN-CVE-2025-1934CGA-jg3w-4g22-rcj5CGA-wr55-6297-288mCGA-qf6p-ppff-25mmCGA-qp35-942p-wwxw
Published 04-03-2025Last modified 04-06-2026
Vulnerability summary
CVE-2025-1934 is a medium (CVSS 6.5) vulnerability in mozilla firefox. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 38% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.45%
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 24 · Related 9DLA-4078-1DLA-4081-1DSA-5874-1DSA-5876-1MGASA-2025-0092MGASA-2025-0093OPENSUSE-SU-2025:14852-1OPENSUSE-SU-2025:14853-1OPENSUSE-SU-2025:14861-1RHSA-2025:2359RHSA-2025:2452RHSA-2025:2479RHSA-2025:2480RHSA-2025:2481RHSA-2025:2484RHSA-2025:2485RHSA-2025:2486RHSA-2025:2699RHSA-2025:2708SUSE-SU-2025:0783-1SUSE-SU-2025:0788-1SUSE-SU-2025:0849-1USN-7334-1USN-7663-1CGA-GR3X-4JFW-6HF2
Timeline
- 04-03-2025PublishedVulnerability first disclosed.
- 04-06-2026Last modifiedVulnerability information updated.
Description
It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
CVSS metrics
6 scores · 6 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 6 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · WolfiEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.45%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
0.00 pp
From 0.45% on 20-09-2026
20-09-202620-10-2026
EPSS score0.45%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu9 products
- firefox< 136.0+build3-0ubuntu0.20.04.1
- mozjs102All versions (No fix recorded)
- mozjs115All versions (No fix recorded)
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
Chainguard2 products
- firefox< 136-r0
- firefox-esr< 136-r0
Debian2 products
- firefox-esr< 128.8.0esr-1~deb12u1 | < 128.8.0esr-1
- thunderbird< 1:128.8.0esr-1~deb12u1 | < 1:128.8.0esr-1
Mozilla2 products
- firefox< 128.8.0 | < 136.0
- thunderbird< 128.8.0 | ≥ 129.0, < 136.0
Wolfi1 product
- firefox< 136-r0
5 vendors · 16 products
