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CVE-2023-6988 Colibri Page Builder <= 1.0.239 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

Medium 6.4 Published Updated

Authenticated attackers can inject arbitrary web scripts via a shortcode, leading to script execution when users view the page.

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-2023-6988?

CVE-2023-6988 is a medium-severity cross-site scripting vulnerability in extendthemes Colibri Page Builder, published on 11 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Colibri Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's extend_builder_render_js shortcode in all versions up to, and including, 1.0.239 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions 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-2023-6988?

It affects 1 product.

Products include Extendthemes Colibri Page Builder.

How do I fix CVE-2023-6988?

No fix has been published for CVE-2023-6988 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-2023-6988 being exploited?

There is no known exploitation of CVE-2023-6988 in the wild and no public exploit code.

Sources

Also known as GHSA-fv4q-v79m-93hj.

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