# CVE-2023-0400: Security feature bypass in Data Loss Prevention (DLP)

> A local user can bypass Data Loss Prevention controls to upload sensitive data from a mapped drive to a web email client.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Feb 2023
- **Updated:** 26 Mar 2025
- **Also known as:** GHSA-pp9v-vrjh-4q7m

## What is CVE-2023-0400?

CVE-2023-0400 is a medium-severity vulnerability in Trellix Data Loss Prevention (DLP), published on 1 Feb 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The protection bypass vulnerability in DLP for Windows 11.9.x is addressed in version 11.10.0. This allowed a local user to bypass DLP controls when uploading sensitive data from a mapped drive into a web email client. Loading from a local driver was correctly prevented. Versions prior to 11.9 correctly detected and blocked the attempted upload of sensitive data.

Weakness: CWE-427 (Uncontrolled Search Path Element), CWE-670 (Always-Incorrect Control Flow Implementation)

## Which versions are affected by CVE-2023-0400?

It affects 1 product.


Products: Trellix Data Loss Prevention.

## How do I fix CVE-2023-0400?

No fix has been published for CVE-2023-0400 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-0400 being exploited?

There is no known exploitation of CVE-2023-0400 in the wild and no public exploit code.

Public exploit code:

- trellix DLP Bypass (github_poc): https://github.com/pinpinsec/CVE-2023-0400

## Other vulnerabilities in Trellix Data Loss Prevention (DLP)

- [CVE-2023-4814](https://insights.sbomify.com/CVE-2023-4814/): Privilege escalation in Data Loss Prevention Endpoint for Windows (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0400 and fix it if it is affected.

What it is: CVE-2023-0400 is a medium-severity vulnerability in Trellix Data Loss Prevention (DLP), published on 1 Feb 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-0400 in the wild and no public exploit code.

Affected product: Trellix Data Loss Prevention (DLP). 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-2023-0400/ (Markdown: https://insights.sbomify.com/CVE-2023-0400/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0400
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0400
- OSV: https://osv.dev/vulnerability/CVE-2023-0400

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0400/
Summaries are generated and may contain mistakes; the official description above is the record.