CVE-2024-8850 MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting

Medium 6.1 Published 19 Sep 2024 Updated 25 Sep 2024

Unauthenticated attackers can inject arbitrary scripts via the email parameter, executing code in victim browsers if they click a crafted link.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2024-8850?

CVE-2024-8850 is a medium-severity cross-site scripting vulnerability in dvankooten MC4WP: Mailchimp for WordPress, published on 19 Sep 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'email' parameter when a placeholder such as {email} is used for the field in versions 4.9.9 to 4.9.16 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Weakness: CWE-79

Which versions are affected by CVE-2024-8850?

It affects 1 product.

Products include Ibericode Mailchimp.

How do I fix CVE-2024-8850?

No fix has been published for CVE-2024-8850 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-2024-8850 being exploited?

There is no known exploitation of CVE-2024-8850 in the wild and no public exploit code.

Sources

Also known as GHSA-m4mc-hq8f-pjxg.