WordPress plugin
Under Construction security & vulnerabilities
No known unpatched vulnerabilities in the latest version
All 5 known vulnerabilities are fixed in the latest release. If you run an older version, update to null or newer.
- Critical0
- High1
- Medium4
- Low0
All Under Construction vulnerabilities
| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤5.82Update to 5.83 | CVE-2026-81295 | |
| Medium6.5 | Authenticated (Subscriber+) Arbitrary File Read via template_thumbnail Parameter ≤5.76Update to 5.81 | CVE-2026-11426 | |
| Medium4.3 | Cross-Site Request Forgery via admin_action_ucp_dismiss_notice ≤3.96Update to 3.97 | CVE-2023-0831 | |
| Medium4.3 | Cross-Site Request Forgery via admin_action_install_weglot ≤3.96Update to 3.97 | CVE-2023-0832 | |
| Medium5.5 | Authenticated Stored Cross-Site Scripting ≤3.85Update to 3.86 | — |
- High7.2Unauthenticated Stored Cross-Site Scripting
≤5.82Update to 5.83
- Medium6.5Authenticated (Subscriber+) Arbitrary File Read via template_thumbnail Parameter
≤5.76Update to 5.81
- Medium4.3Cross-Site Request Forgery via admin_action_ucp_dismiss_notice
≤3.96Update to 3.97
- Medium4.3Cross-Site Request Forgery via admin_action_install_weglot
≤3.96Update to 3.97
- Medium5.5Authenticated Stored Cross-Site Scripting
≤3.85Update to 3.86
Under Construction: common questions
Does Under Construction have known vulnerabilities?
Yes. VulnCrest Radar lists 5 known vulnerabilities in Under Construction: 1 high, 4 medium. None are known to affect version null.
How do I check which version of Under Construction I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Under Construction vulnerability?
CVE-2026-81295, published Sep 2, 2026: Under Construction <= 5.82 - Unauthenticated Stored Cross-Site Scripting. Severity: High (CVSS 7.2).
Is any Under Construction vulnerability listed in CISA KEV?
No. None of the known Under Construction vulnerabilities is currently listed in the CISA KEV catalog.