CVE-2025-9181
6.5
MEDIUM
CVSS 3.1
EPSS 0.11%
Description
Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
How to fix CVE-2025-9181
To remediate CVE-2025-9181, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 128.14.0esr-1~deb11u1 or later
- Debian/thunderbird—upgrade to 1:128.14.0esr-1~deb11u1 or later
Is CVE-2025-9181 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 128.14.0esr-1~deb11u1
- from 0, < 1:128.14.0esr-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |