# CVE-2023-39921: WordPress Molongui Plugin <= 4.6.19 is vulnerable to Cross Site Scripting (XSS)

> Stored XSS in Molongui WordPress plugin allows attackers to inject malicious scripts, potentially leading to session hijacking or site compromise.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L`)
- **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:** 30 Nov 2023
- **Updated:** 28 Apr 2026
- **Also known as:** GHSA-43p5-xqqc-4x3g

## What is CVE-2023-39921?

CVE-2023-39921 is a medium-severity cross-site scripting vulnerability in Author Box, Guest Author and Co-Authors for Your Posts – Molongui, published on 30 Nov 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Molongui Author Box, Guest Author and Co-Authors for Your Posts – Molongui allows Stored XSS.This issue affects Author Box, Guest Author and Co-Authors for Your Posts – Molongui: from n/a through 4.6.19.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2023-39921?

It affects 1 product.


Products: Amitzy Molongui.

## How do I fix CVE-2023-39921?

No fix has been published for CVE-2023-39921 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-39921 being exploited?

There is no known exploitation of CVE-2023-39921 in the wild and no public exploit code.

## Other vulnerabilities in Author Box, Guest Author and Co-Authors for Your Posts – Molongui

- [CVE-2023-39164](https://insights.sbomify.com/CVE-2023-39164/): WordPress Molongui Plugin <= 4.6.19 is vulnerable to Cross Site Scripting (XSS) (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-39921 and fix it if it is affected.

What it is: CVE-2023-39921 is a medium-severity cross-site scripting vulnerability in Author Box, Guest Author and Co-Authors for Your Posts – Molongui, published on 30 Nov 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-39921 in the wild and no public exploit code.

Affected product: Author Box, Guest Author and Co-Authors for Your Posts – Molongui. 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-2023-39921/ (Markdown: https://insights.sbomify.com/CVE-2023-39921/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-39921
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-39921
- OSV: https://osv.dev/vulnerability/CVE-2023-39921

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-39921/
Summaries are generated and may contain mistakes; the official description above is the record.