CVE-2025-0237
firefox-esr - security update
5.4
MEDIUM
CVSS 3.1
EPSS 0.16%
Description
The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
How to fix CVE-2025-0237
To remediate CVE-2025-0237, upgrade the affected package to a fixed version below.
- —upgrade to 128.6.0esr-1~deb11u3 or later
- —upgrade to 128.6.0esr-1~deb11u3 or later
- —upgrade to 128.6.0esr-1~deb12u1 or later
- —upgrade to 1:128.6.0esr-1~deb11u1 or later
Is CVE-2025-0237 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 128.6.0esr-1~deb11u3
- from 0, < 128.6.0esr-1~deb11u3
- from 0, < 128.6.0esr-1~deb12u1
- from 0, < 1:128.6.0esr-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |