blogsafe.org My Downloads

BlogSafe.org

WordPress CVEs

Search and review WordPress-related vulnerability records.

← Back to CVE list

CVE-2021-39320

MEDIUM 6.1 CVSS 3.1
Published
September 1, 2021
Last modified
June 17, 2026
NVD status
Modified
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

Affected WordPress components

  • underConstruction Plugin · underconstruction
    Confirmed match Abandoned
    From 1.18 (including) to 1.18 (including); Before 1.19
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Noah Kagan underConstruction — From 1.18 (including) to 1.18 (including)
  • underconstruction_project underconstruction — Before 1.19

References

  • wpscan.com https://wpscan.com/vulnerability/49ae1df0-d6d2-4cbb-9a9d-bf3599429875 Third Party Advisory
  • www.wordfence.com https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39320 Third Party Advisory
  • nvd.nist.gov Official NVD record