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

Medium 5.4 Published 9 Mar 2022 Updated 4 Aug 2024

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

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: None listed

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

Which versions are affected by CVE-2021-33852?

It affects 1 product.

Products include 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.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-33852 being exploited?

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

Sources

Also known as GHSA-7883-f6f2-8g89.