The ADONewConnection Connect function in adodb.php in XAMPP 1.6.0a and earlier for Windows uses untrusted input for the database server hostname, which allows remote attackers to trigger a library buffer overflow and execute arbitrary code via a long host parameter, or have other unspecified impact. NOTE: it could be argued that this is an issue in mssql_connect (CVE-2007-1411.1) in PHP, or an issue in the ADOdb Library, and the proper fix should be in one of these products; if so, then this should not be treated as a vulnerability in XAMPP.

Multiple SQL injection vulnerabilities in XAMPP 1.6.0a for Windows allow remote attackers to execute arbitrary SQL commands via unspecified vectors in certain test scripts.

Multiple cross-site scripting (XSS) vulnerabilities in XAMPP 1.4.x allow remote attackers to inject arbitrary web script or HTML via (1) cds.php, (2) Guestbook-EN.pl, or (3) phonebook.php.

Directory traversal vulnerability in XAMPP before 1.4.14 allows remote attackers to inject arbitrary HTML and PHP code via lang.php.

XAMPP 1.4.x has multiple default or null passwords, which allows attackers to gain privileges.

The installer in XAMPP through 8.1.12 allows local users to write to the C:\xampp directory. Common use cases execute files under C:\xampp with administrative privileges.