Ultimate Under Construction
Ultimate Under Construction has one disclosed vulnerability in the WordSec catalog, all reported in 2024; it is fixed as of September 2026. Their average CVSS score is 4.4, and the most serious one scores 4.4 out of 10.
The most common weakness is Cross-Site Scripting, behind 1 of the records (100%).
The one issue recorded for Ultimate Under Construction has a vendor fix available, so running the current release closes it.
All of these findings were reported by Cronus. Ultimate Under Construction is installed on roughly 1,000 WordPress sites, so each unpatched flaw has a wide blast radius. The current release is tested up to WordPress 6.6.7.
CVE-2024-33943Ultimate Under Construction <= 1.9.3 - Authenticated (Administrator+) Stored Cross-Site Scripting
Read the full analysisVulnerability Records
Ultimate Under Construction
Author
Mike Morrow
With the Ultimate Under Construction plugin you are able to turn on a holding page for all non-admin users that visit your website. This holding page will allow you to work on your WordPress website on a live server without worrying about the impacts it may have. This Under Construction plugin allows for many levels of customisation, with millions of solid background colours to choose from, Patterned background and even a region to allow more advanced users to enter a completely custom block of HTML complete with styling there really are no limitations to what you can create.
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