uploader.php in the KCFinder integration project through 2018-06-01 for Drupal mishandles validation, aka SA-CONTRIB-2018-024. NOTE: This project is not covered by Drupal's security advisory policy.
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.
A cross-site scripting (XSS) vulnerability in upload.php in SunHater KCFinder 3.20-test1, 3.20-test2, 3.12, and earlier allows remote attackers to inject arbitrary web script or HTML via the CKEditorFuncNum parameter.