The ckeditor-for-wordpress plugin before 4.5.3.1 for WordPress has reflected XSS in the "built-in (old)" file browser.

In CKSource CKFinder before 2.5.0.1 for ASP.NET, authenticated users could download any file from the server if the correct path to a file was provided.

An issue was discovered in CKFinder through 2.6.2.1. Improper checks of file names allows remote attackers to upload files without any extension (even if the application was configured to accept files only with a defined set of extensions). This affects CKFinder for ASP, CKFinder for ASP.NET, CKFinder for ColdFusion, and CKFinder for PHP.

An issue was discovered in CKFinder through 2.6.2.1 and 3.x through 3.5.0. The documentation has misleading information that could lead to a conclusion that the application has a built-in bulletproof content sniffing protection.

A Cross-Site scripting vulnerability has been found in CKSource CKEditor affecting versions 4.15.1 and earlier. An attacker could send malicious javascript code through the /ckeditor/samples/old/ajax.html file and retrieve an authorized user's information.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal CKEditor 4 LTS - WYSIWYG HTML editor allows Cross-Site Scripting (XSS).This issue affects CKEditor 4 LTS - WYSIWYG HTML editor: from 1.0.0 before 1.0.1.

Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal CKEditor 5 Premium Features allows Functionality Bypass.This issue affects CKEditor 5 Premium Features: from 0.0.0 before 1.2.10, from 1.3.0 before 1.3.6, from 1.4.0 before 1.4.3, from 1.5.0 before 1.5.1, from 1.6.0 before 1.6.4.

CKFinder 1.4.3 is vulnerable to Cross Site Scripting (XSS) in the File Upload function. An attacker can upload a crafted SVG containing active content.