GetSimple CMS v3.3.16 was discovered to contain a remote code execution (RCE) vulnerability via the editedfile parameter in admin/theme-edit.php.

admin/profile.php in GetSimple CMS 3.x has XSS in a name field.

Multiple cross-site scripting (XSS) vulnerabilities in GetSimple CMS before 3.2.1 allow remote attackers to inject arbitrary web script or HTML via the (1) id parameter to backup-edit.php; (2) title or (3) menu parameter to edit.php; or (4) path or (5) returnid parameter to filebrowser.php in admin/. NOTE: the path parameter in admin/upload.php vector is already covered by CVE-2012-6621.

Cross-site scripting (XSS) vulnerability in admin/template/js/uploadify/uploadify.swf in GetSimple CMS 3.3.13 allows remote attackers to inject arbitrary web script or HTML, as demonstrated by the movieName parameter.

Multiple cross-site scripting (XSS) vulnerabilities in GetSimple CMS 3.1.2 and 3.2.3 allow remote attackers to inject arbitrary web script or HTML via the (1) post-menu field to edit.php or (2) Display name field to settings.php. NOTE: The Custom Permalink Structure and Email Address fields are already covered by CVE-2012-6621.

Multiple cross-site scripting (XSS) vulnerabilities in GetSimple CMS 3.3.1 allow remote attackers to inject arbitrary web script or HTML via the (1) param parameter to admin/load.php or (2) user, (3) email, or (4) name parameter in a Save Settings action to admin/settings.php.

Cross-site scripting (XSS) vulnerability in admin/components.php in GetSimple CMS 2.01 allows remote attackers to inject arbitrary web script or HTML via the val[] parameter.

In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but there are several alternative cases in which HTML can be executed, such as a file with no extension or an unrecognized extension (e.g., the test or test.asdf filename), because of admin/upload-uploadify.php, and validatesafefile in admin/inc/securityfunctions.php.