Information
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Advisory by Netsparker
Name: Cross-Site Scripting Vulnerability in Chamilo LMS
Affected Software: Chamilo LMS
Affected Versions: 1.11.14 
Homepage: https://chamilo.org/en/
Vulnerability: Cross-Site Scripting
Severity: High
Status: Fixed
CVSS Score (3.0): 7.4 (High)
Netsparker Advisory Reference: NS-21-001

Technical Details
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URL: http://alihost/chamilo/main/calendar/agenda_list.php?type=x"%20onmouseover=netsparker(0x01CE61)%20x="#collapse-personal_1
Parameter Name: type
Parameter Type: GET
Attack Pattern: x%22+onmouseover%3dnetsparker(0x01CE61)+x%3d%22

For more information on cross-site scripting vulnerabilities read the article Cross-site Scripting (XSS).

Advisory Timeline
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14th January 2021 - First Contact
27th January 2021 - Vendor Fixed
28th January 2021 - Advisory Released

Credits & Authors
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These issues have been discovered by Ali Oğuz while testing the Netsparker Web Application Security Scanner.

About Netsparker
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Netsparker web application security scanner finds and reports security flaws and vulnerabilities such as SQL Injection and Cross-site Scripting (XSS) in all websites and web applications, regardless of the platform and technology they are built on. Netsparker scanning engine’s unique detection and exploitation techniques allow it to be dead accurate in reporting vulnerabilities.