CVE-2023-6561 Cross-site scripting in Featured Image from URL (FIFU)

Medium 6.4 Published 11 Jan 2024 Updated 8 Apr 2026

Authenticated contributors can inject arbitrary scripts via featured image alt text, 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-2023-6561?

CVE-2023-6561 is a medium-severity cross-site scripting vulnerability in marceljm Featured Image from URL (FIFU), published on 11 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Featured Image from URL (FIFU) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the featured image alt text in all versions up to, and including, 4.5.3 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-2023-6561?

It affects 1 product.

Products include Fifu Featured Image From Url.

How do I fix CVE-2023-6561?

No fix has been published for CVE-2023-6561 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-2023-6561 being exploited?

There is no known exploitation of CVE-2023-6561 in the wild and no public exploit code.

Sources

Also known as GHSA-m5hc-cfwh-w6jp.