CVE-2025-11940 LibreWolf Installer setup.nsi uncontrolled search path
Local attackers can exploit an uncontrolled search path in the LibreWolf installer to execute arbitrary code, requiring a version upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-11940?
CVE-2025-11940 is a high-severity path traversal vulnerability in LibreWolf, published on 19 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security vulnerability has been detected in LibreWolf up to 143.0.4-1 on Windows. This affects an unknown function of the file assets/setup.nsi of the component Installer. Such manipulation leads to uncontrolled search path. The attack must be carried out locally. Attacks of this nature are highly complex. The exploitability is reported as difficult. Upgrading to version 144.0-1 mitigates this issue. The name of the patch is dd10e31dd873e9cb309fad8aed921d45bf905a55. It is suggested to upgrade the affected component.
Which versions are affected by CVE-2025-11940?
How do I fix CVE-2025-11940?
No fix has been published for CVE-2025-11940 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-11940 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-11940 exists.
Sources
Also known as GHSA-5ph2-8ccr-vhmp.