The underConstruction plugin <= 1.18 for WordPress echoes out the raw value of `$GLOBALS['PHP_SELF']` in the ucOptions.php file. On certain configurations including Apache+modPHP, this makes it possible to use it to perform a reflected Cross-Site Scripting attack by injecting malicious code in the request path.
CVE-2021-39320 is a medium severity with CVSS 6.1 Cross-Site Scripting issue affecting the Plugin underConstruction. It affects Versions up to 1.18 and is fixed in 1.19.
CVE-2021-39320 is tracked for the Plugin underConstruction as medium severity with CVSS 6.1. The affected range is Versions up to 1.18. Update underConstruction to 1.19 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
underconstruction
View on wordpress.org
|
| CVE | CVE-2021-39320 |
| Patched Versions |
1.19
|
| Affected Versions |
Versions up to 1.18
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
underConstruction <= 1.19 - Cross-Site Request Forgery to Construction Mode Disabled
underConstruction < 1.09 - Cross-Site Request Forgery
underConstruction <= 1.20 - Authenticated (Admin+) Stored Cross-Site Scripting
underConstruction <= 1.21 - Authenticated (Administrator+) Stored Cross-Site Scripting
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