# CVE-2021-33852: Cross-site scripting in WordPress Post Duplicator Plugin

> Attackers can inject JavaScript via the Duplicate Title field, executing arbitrary code in users' browsers when viewing settings or the root page.

- **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:** 9 Mar 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7883-f6f2-8g89

## What is CVE-2021-33852?

CVE-2021-33852 is a medium-severity cross-site scripting vulnerability in WordPress Post Duplicator Plugin, published on 9 Mar 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A cross-site scripting (XSS) attack can cause arbitrary code (JavaScript) to run in a user's browser and can use an application as the vehicle for the attack. The XSS payload given in the "Duplicate Title" text box executes whenever the user opens the Settings Page of the Post Duplicator Plugin or the application root page after duplicating any of the existing posts.

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

## Which versions are affected by CVE-2021-33852?

It affects 1 product.


Products: Metaphorcreations Post Duplicator.

## How do I fix CVE-2021-33852?

No fix has been published for CVE-2021-33852 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-33852 being exploited?

There is no known exploitation of CVE-2021-33852 in the wild and no public exploit code.

## Other vulnerabilities in WordPress Post Duplicator Plugin

- [CVE-2025-24736](https://insights.sbomify.com/CVE-2025-24736/): WordPress Post Duplicator plugin <= 2.35 - Broken Access Control vulnerability (medium 4.3)
- [CVE-2024-12472](https://insights.sbomify.com/CVE-2024-12472/): Post Duplicator <= 2.36 - Authenticated (Contributor+) Protected Post Disclosure (medium 4.3)
- [CVE-2023-49835](https://insights.sbomify.com/CVE-2023-49835/): WordPress Post Duplicator plugin <= 2.31 - Broken Access Control vulnerability (medium 4.3)
- [CVE-2016-15027](https://insights.sbomify.com/CVE-2016-15027/): meta4creations Post Duplicator Plugin notices.php mtphr_post_duplicator_notice cross site scripting (low 3.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-33852 and fix it if it is affected.

What it is: CVE-2021-33852 is a medium-severity cross-site scripting vulnerability in WordPress Post Duplicator Plugin, published on 9 Mar 2022. 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-2021-33852 in the wild and no public exploit code.

Affected product: WordPress Post Duplicator Plugin. 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-2021-33852/ (Markdown: https://insights.sbomify.com/CVE-2021-33852/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-33852
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-33852
- OSV: https://osv.dev/vulnerability/CVE-2021-33852

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-33852/
Summaries are generated and may contain mistakes; the official description above is the record.