CVE-2025-8034
8.8
HIGH
CVSS 3.1
EPSS 0.54%
Description
Memory safety bugs present in Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird ESR 128.12, Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
How to fix CVE-2025-8034
To remediate CVE-2025-8034, upgrade the affected package to a fixed version below.
- —upgrade to 128.13.0esr-1~deb11u1 or later
- —upgrade to 1:128.13.0esr-1~deb11u1 or later
Is CVE-2025-8034 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 128.13.0esr-1~deb11u1
- from 0, < 1:128.13.0esr-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |