Cross-site scripting (XSS) vulnerability in the Enhanced Image (aka image2) plugin for CKEditor (in versions 4.5.10 through 4.9.1; fixed in 4.9.2), as used in Drupal 8 before 8.4.7 and 8.5.x before 8.5.2 and other products, allows remote attackers to inject arbitrary web script through a crafted IMG element.
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://www.drupal.org/sa-core-2018-003
https://github.com/ckeditor/ckeditor-dev/blob/master/CHANGES.md