# CVE-2023-0439: NEX-Forms < 8.4.4 - Authenticated Stored XSS

> Authenticated attackers can inject malicious scripts via form names in NEX-Forms, potentially leading to session hijacking or code execution.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **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:** 17 Jul 2023
- **Updated:** 30 Oct 2024
- **Also known as:** GHSA-42c6-gcr4-xh6h

## What is CVE-2023-0439?

CVE-2023-0439 is a medium-severity cross-site scripting vulnerability in Unknown NEX-Forms, published on 17 Jul 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

The NEX-Forms WordPress plugin before 8.4.4 does not escape its form name, which could lead to Stored Cross-Site Scripting issues. By default only SuperAdmins (in multisite) / admins (in single site) can create forms, however there is a settings allowing them to give lower roles access to such feature.

## Which versions are affected by CVE-2023-0439?

It affects 1 product.


Products: Basixonline Nex-Forms.

## How do I fix CVE-2023-0439?

No fix has been published for CVE-2023-0439 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-0439 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0439 exists.

## Other vulnerabilities in Unknown NEX-Forms

- [CVE-2015-9452](https://insights.sbomify.com/CVE-2015-9452/): SQL injection in n/a (critical 9.8)
- [CVE-2022-3142](https://insights.sbomify.com/CVE-2022-3142/): NEX-Forms < 7.9.7 - Authenticated SQLi (high 8.8)
- [CVE-2024-53808](https://insights.sbomify.com/CVE-2024-53808/): WordPress NEX-Forms plugin <= 8.7.8 - SQL Injection vulnerability (high 8.5)
- [CVE-2023-50838](https://insights.sbomify.com/CVE-2023-50838/): WordPress NEX-Forms – Ultimate Form Builder Plugin <= 8.5.5 is vulnerable to SQL Injection (high 7.6)
- [CVE-2021-34675](https://insights.sbomify.com/CVE-2021-34675/): Auth bypass in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0439 and fix it if it is affected.

What it is: CVE-2023-0439 is a medium-severity cross-site scripting vulnerability in Unknown NEX-Forms, published on 17 Jul 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0439 exists.

Affected product: Unknown NEX-Forms. 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-2023-0439/ (Markdown: https://insights.sbomify.com/CVE-2023-0439/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0439
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0439
- OSV: https://osv.dev/vulnerability/CVE-2023-0439

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0439/
Summaries are generated and may contain mistakes; the official description above is the record.