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CVE-2024-3558 Custom Field Suite <= 2.6.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via cfs[post_title]

Medium 6.4 Published Updated

Authenticated attackers can inject arbitrary scripts via the post title field, leading to stored XSS execution for other users.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2024-3558?

CVE-2024-3558 is a medium-severity cross-site scripting vulnerability in mgibbs189 Custom Field Suite, published on 20 Jun 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Custom Field Suite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the the 'cfs[post_title]' parameter versions up to, and including, 2.6.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Weakness: CWE-79

Which versions are affected by CVE-2024-3558?

It affects 1 product.

Products include Custom Field Suite Project Custom Field Suite.

How do I fix CVE-2024-3558?

No fix has been published for CVE-2024-3558 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-2024-3558 being exploited?

There is no known exploitation of CVE-2024-3558 in the wild and no public exploit code.

Sources

Also known as GHSA-r49q-p832-vm3j.

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