Name: CVE-2021-39320: Improper Neutralization of Input During Web Page Generation
Creator: Rapid7
Published: 2021-09-01T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-39320, CWE-79, CVSS 6.1, EPSS 0.19664

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.

CVSS Details

CVSS 3.1 Base Score: 6.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Underconstruction Plugin	—	Update underconstruction plugin to version 1.19, or a newer patched version	May 15, 2025	Aug 31, 2021

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CVSS Details

Covered by Rapid7

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