# CVE-2023-0420: Custom Post Type and Taxonomy GUI Manager <= 1.1 - Stored XSS via CSRF

> Attackers can inject stored XSS payloads via CSRF, allowing execution of malicious scripts in admin sessions.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 24 Apr 2023
- **Updated:** 4 Feb 2025
- **Also known as:** GHSA-qrm5-6xmw-6xcq

## What is CVE-2023-0420?

CVE-2023-0420 is a medium-severity cross-site scripting vulnerability in Unknown Custom Post Type and Taxonomy GUI Manager, published on 24 Apr 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

The Custom Post Type and Taxonomy GUI Manager WordPress plugin through 1.1 does not have CSRF, and is lacking sanitising as well as escaping in some parameters, allowing attackers to make a logged in admin put Stored Cross-Site Scripting payloads via CSRF

## Which versions are affected by CVE-2023-0420?

It affects 1 product.


Products: Custom Post Type and Taxonomy Gui Manager Project Custom Post Type and Taxonomy Gui Manager.

## How do I fix CVE-2023-0420?

No fix has been published for CVE-2023-0420 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-0420 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0420 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0420 and fix it if it is affected.

What it is: CVE-2023-0420 is a medium-severity cross-site scripting vulnerability in Unknown Custom Post Type and Taxonomy GUI Manager, published on 24 Apr 2023. An attacker needs administrator access to exploit it, 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-2023-0420 exists.

Affected product: Unknown Custom Post Type and Taxonomy GUI Manager. 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-2023-0420/ (Markdown: https://insights.sbomify.com/CVE-2023-0420/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0420
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0420
- OSV: https://osv.dev/vulnerability/CVE-2023-0420

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0420/
Summaries are generated and may contain mistakes; the official description above is the record.