VTiger CRM <= 8.1.0 does not correctly check user privileges. A low-privileged user can interact directly with the "Migration" administrative module to disable arbitrary modules.
modules/Users/models/Module.php in Vtiger CRM 7.5.0 allows a remote authenticated attacker to run arbitrary PHP code because an unprotected endpoint allows them to write this code to the config.inc.php file (executed on every page load).
SQL injection vulnerability in Vtiger CRM v.7.5.0 allows a remote authenticated attacker to escalate privileges via the getQueryColumnsList function in ReportRun.php.
Reflected XSS in Vtiger CRM v7.2.0 in vtigercrm/index.php? through the view parameter can result in an attacker performing malicious actions to users who open a maliciously crafted link or third-party web page.
Unrestricted file upload vulnerability in the Settings_Vtiger_CompanyDetailsSave_Action class in modules/Settings/Vtiger/actions/CompanyDetailsSave.php in Vtiger CRM 6.3.0 and earlier allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension, then accessing it via a direct request to the file in test/logo/.