CVE-2025-1931
7.5
HIGH
CVSS 3.1
EPSS 0.39%
Description
It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
How to fix CVE-2025-1931
To remediate CVE-2025-1931, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 128.8.0esr-1~deb11u1 or later
- —upgrade to 1:128.8.0esr-1~deb11u1 or later
Is CVE-2025-1931 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 128.8.0esr-1~deb11u1
- from 0, < 1:128.8.0esr-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |