Multiple directory traversal vulnerabilities in index.php in vTiger CRM 4.2 and earlier allow remote attackers to read or include arbitrary files, an ultimately execute arbitrary PHP code, via .. (dot dot) and null byte ("%00") sequences in the (1) module parameter and (2) action parameter in the Leads module, as also demonstrated by injecting PHP code into log messages and accessing the log file.

The uploads module in vTiger CRM 4.2 and earlier allows remote attackers to upload arbitrary files, such as PHP files, via the add2db action.

The Users module in vTiger CRM 4.2 and earlier allows remote attackers to execute arbitrary PHP code via an arbitrary file in the templatename parameter, which is passed to the eval function.

Multiple SQL injection vulnerabilities in vTiger CRM 4.2 and earlier allow remote attackers to execute arbitrary SQL commands via the (1) username in the login form or (2) record parameter, as demonstrated in the EditView action for the Contacts module.

Multiple SQL injection vulnerabilities in vTiger CRM 4.2 and earlier allow remote attackers to inject arbitrary SQL commands and bypass authentication via the (1) user_name and (2) date parameter in the HelpDesk module.

Multiple cross-site scripting (XSS) vulnerabilities in vTiger CRM 4.2 and earlier allow remote attackers to inject arbitrary web script or HTML via (1) various input fields, including the contact, lead, and first or last name fields, (2) the record parameter in a DetailView action in the Leads module for index.php, (3) the $_SERVER['PHP_SELF'] variable, which is used in multiple locations such as index.php, and (4) aggregated RSS feeds in the RSS aggregation module.