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Date: Mon, 07 Dec 2015 18:14:39 +0100
From: "Curesec Research Team (CRT)" <>
Subject: [FD] appRain 4.0.3: XSS

Security Advisory - Curesec Research Team

1. Introduction

Affected Product:    appRain 4.0.3
Fixed in:            not fixed
Fixed Version Link:  n/a
Vendor Website:
Vulnerability Type:  XSS
Remote Exploitable:  Yes
Reported to vendor:  10/02/2015
Disclosed to public: 12/02/2015
Release mode:        Full Disclosure
CVE:                 requested, but not assigned
Credits              Tim Coen of Curesec GmbH

2. Overview

There are two reflected XSS vulnerabilities in appRain 4.0.3. This can lead to
the injection of JavaScript keyloggers or the bypassing of CSRF protection. In
the case of appRain, this may lead to code execution.

3. XSS 1


Medium 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N


The search of the file manager echoes user input without encoding, leading to
reflected XSS.

Proof of Concept

    <form action="http://localhost/apprain-source-4.0.3/admin/filemanager/upload" method="POST">
      <input type="hidden" name="data[FileManager][search]" value="'"><script>alert(1)</script>" />
      <input type="submit" value="Submit request" />


private function btnFilemanagerSrcBox($srcstr = "")

    $html = '<form method="post">
    <input type="text" name="data[FileManager][search]" value="' . $srcstr . '" />
    <div class="button" style="float:right"><input type="submit" value="Search" /></pre>

    return array('box' => $html);

4. XSS 2


Medium 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N


The appeditor echoes the given file name and path without encoding, leading to
reflected XSS.

Proof of Concept



<?php foreach($fileeditorqueue as $row):?>
        <?php $farr = explode('/',$row);?>
        <?php if( $row == $loc):?>
                <li class="ui-tabs-selected">
<a href="?loc=<?php echo $row ;?>" title="<?php echo $row ;?>"><?php echo(end($farr)); ?></a>
        <?php else: ?>
<a href="?loc=<?php echo $row ;?>" title="<?php echo $row ;?>"><?php echo(end($farr));?></a>
<span class="closefiletab">X</span>
        <?php endif;?>
<?php endforeach;?>

5. Solution

This issue was not fixed by the vendor.

6. Report Timeline

10/02 Informed Vendor. Mailbox is full, used
/2015 instead (no reply)
10/21 Reminded Vendor of Disclosure Date
10/21 Vendor anounces fix for 11/02/2015
11/04 No fix released, extended public disclosure date to 11/11/2015
11/05 Vendor asks for list of organizations that may help implementing fixes
11/11 Replied that we do not have lists, and that we do not have the resources
/2015 to implement fixes ourselves. Extended release date to 11/18/2015 and
      offered further extension if needed (no reply)
11/17 CVE Requested (no reply)
11/24 Reminded Vendor of release date, extended date to 12/02/2015 and offered
/2015 extension if needed (no reply)
12/02 Disclosed to public

Blog Reference:

Curesec GmbH
Curesec Research Team
Romain-Rolland-Str 14-24
13089 Berlin, Germany

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