CVE-2021-39320

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CVSS 3.1

6.1 medium

EPSS

2%p82

Published

Sep 1, 2021 (Sep 1, 2021)

Modified

Jun 17, 2026

Description

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.

Vendors: underconstruction project
Products: underconstruction
Ecosystems: WordPress
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (2.3%)

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