In affected versions of WordPress a vulnerability in the stats() method of class-wp-object-cache.php can be exploited to execute cross-site scripting (XSS) attacks. This has been patched in version 5.4.1 along with all the previously affected versions via a minor release (5.3.3 5.2.6 5.1.5 5.0.9 4.9.14 4.8.13 4.7.17 4.6.18 4.5.21 4.4.22 4.3.23 4.2.27 4.1.30 4.0.30 3.9.31 3.8.33 3.7.33).