# CVE-2022-4428: support_uri validation missing in WARP client for Windows

> An attacker with local file system access can escalate privileges and execute arbitrary code via a crafted support_uri in the WARP client settings.

- **Severity:** High 8.9 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Jan 2023
- **Updated:** 9 Apr 2025

## What is CVE-2022-4428?

CVE-2022-4428 is a high-severity vulnerability in Cloudflare WARP, published on 11 Jan 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

support_uri parameter in the WARP client local settings file (mdm.xml) lacked proper validation which allowed for privilege escalation and launching an arbitrary executable on the local machine upon clicking on the "Send feedback" option. An attacker with access to the local file system could use a crafted XML config file pointing to a malicious file or set a local path to the executable using Cloudflare Zero Trust Dashboard (for Zero Trust enrolled clients).

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2022-4428?

It affects 1 product.


Products: Cloudflare Warp.

## How do I fix CVE-2022-4428?

No fix has been published for CVE-2022-4428 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-4428 being exploited?

There is no known exploitation of CVE-2022-4428 in the wild and no public exploit code.

## Other vulnerabilities in Cloudflare WARP

- [CVE-2022-2225](https://insights.sbomify.com/CVE-2022-2225/): Zero Trust Secure Web Gateway policies bypass using WARP client subcommands (high 8.1)
- [CVE-2023-2754](https://insights.sbomify.com/CVE-2023-2754/): Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client (high 7.4)
- [CVE-2023-1862](https://insights.sbomify.com/CVE-2023-1862/): Remote access to warp-svc.exe in Cloudflare WARP (high 7.3)
- [CVE-2023-0652](https://insights.sbomify.com/CVE-2023-0652/): Local Privilege Escalation in Cloudflare WARP Installer (Windows) (high 7.0)
- [CVE-2023-1412](https://insights.sbomify.com/CVE-2023-1412/): Local Privilege Escalation Vulnerability in WARP's MSI Installer (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-4428 and fix it if it is affected.

What it is: CVE-2022-4428 is a high-severity vulnerability in Cloudflare WARP, published on 11 Jan 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-4428 in the wild and no public exploit code.

Affected product: Cloudflare WARP. 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-2022-4428/ (Markdown: https://insights.sbomify.com/CVE-2022-4428/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-4428
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-4428
- OSV: https://osv.dev/vulnerability/CVE-2022-4428

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-4428/
Summaries are generated and may contain mistakes; the official description above is the record.