source: https://www.securityfocus.com/bid/47309/info
eForum is prone to an arbitrary-file-upload vulnerability because the application fails to adequately sanitize user-supplied input.
An attacker can exploit this issue to upload arbitrary code and run it in the context of the webserver process.
eForum 1.1 is vulnerable; other versions may also be affected.
if (isset($_FILES)) { //upload attachments
...snip...
$invalidFileTypes = array('php', 'php3', 'php4', 'php5', 'exe', 'dll', 'so', 'htaccess');
$uploaddir = $eforum->path.'/upload';
$upfiles = $_FILES['efattachment'];
foreach ($upfiles['name'] as $idx => $upname) {
if ($upname != '') {
$source = $upfiles['tmp_name'][$idx];
if (is_uploaded_file($source)) {
if (in_array($fmanager->FileExt($upname), $invalidFileTypes)) { continue; }