eTicket v.1.5.1.1 Multiple Cross-Site Scripting

Author: Attila Gerendi (Darkz)
Date: June 29, 2007
Package: eTicket (http://eticket.sourceforge.net/)
Versions Affected: v.1.5.1.1 (Other versions may also be affected)
Severity: XSS

Input passed to "$_SERVER['REQUEST_URI']" in various scrips and includes is not properly sanitised before being used. This can be exploited to insert arbitrary HTML and script code, which is executed in a user's browser session in context of an affected site when malicious data is viewed.

Vulnerable code pieces:

user_login.php on line 7:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="post" name="user_login">

admin_login.php on line 7:
"<form action="<?=$_SERVER['REQUEST_URI']?>" method="post" name="admin_login">"

user_group.php on line 15:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="post">

rep.php on line 15:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="post">

pref.php on line 15:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="post">

my.php on line 15:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="post">

main.php on line 216:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="POST">

mail.php on line 16:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="post">

cat.php on line 16:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="post">

banlist_delete.php on line 13:
<form action="<?=$_SERVER['REQUEST_URI']?>" method="post">

banlist_delete.php on line 43:
<a href="<?=$_SERVER['REQUEST_URI']?>"><?=LANG_BACK_TO_LIST?></a>

banlist_addedit.php on line 27:
<form name="form" action="<?=$_SERVER['REQUEST_URI']?>" method="post" onsubmit="return validateForm(this);">

banlist_addedit.php on line 40:
<a href="<?=$_SERVER['REQUEST_URI']?>"><?=LANG_BACK_TO_LIST?></a>

banlist.php on line 41:
<form action="<?=$_SERVER['REQUEST_URI']?>" name="banlist">

searc_form.php

$surl=$_SERVER['PHP_SELF'].'?s='.$news;
$qs=preg_replace('/s=(basic|advanced)/', '', $_SERVER['QUERY_STRING']);
if ($qs != '') { $surl.=(substr($qs, 0, 1) == '&')?$qs:"&amp;$qs"; }

?>
    <input type="submit" name="search_submit" class="inputsubmit" value="<?=LANG_SEARCH?>">
    [<a href="<?=$surl?>"><?=$stext?></a>]

Status:
1. Contacted the author at June 29, 2007 via sourceforge tracker (https://sourceforge.net/tracker/?func=detail&atid=725721&aid=1745220&group_id=132967).
2. The author concluded "I am not happy that this is a real bug, and therefore will be closed until further notice."

Solution:
-edit the source code to ensure the input is properly sanitized.