# 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.

- **Severity:** High 7.3 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2025
- **Updated:** 20 Oct 2025
- **Also known as:** GHSA-5ph2-8ccr-vhmp

## 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.

Weakness: CWE-427 (Uncontrolled Search Path Element), CWE-426 (Untrusted Search Path)

## 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.

## Is CVE-2025-11940 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-11940 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-11940 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-11940 exists.

Affected product: LibreWolf. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-11940/ (Markdown: https://insights.sbomify.com/CVE-2025-11940/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-11940
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-11940
- OSV: https://osv.dev/vulnerability/CVE-2025-11940

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-11940/
Summaries are generated and may contain mistakes; the official description above is the record.