Props to Simon Scannell of RIPS Technologies for finding and disclosing two issues.
The first, a cross-site scripting (XSS) vulnerability found in post previews by contributors.
The second was a cross-site scripting vulnerability in stored comments.
Props to Tim Coen for disclosing an issue where validation and sanitization
of a URL could lead to an open redirect.
Props to Anshul Jain for disclosing reflected cross-site scripting during media uploads.
Props to Zhouyuan Yang of Fortinets FortiGuard Labs who disclosed a vulnerability
for cross-site scripting (XSS) in shortcode previews.
Props to Ian Dunn of the Core Security Team for finding and disclosing a case where
reflected cross-site scripting could be found in the dashboard.
Props to Soroush Dalilifrom NCC Group for disclosing an issue with URL
sanitization that can lead to cross-site scripting (XSS) attacks.
In addition to the above changes, we are also updating jQuery on older versions of WordPress.
This change was added in 5.2.1 and is now being brought to older versions.