Information
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Advisory by Netsparker
Name: Cross-Site Scripting Vulnerability in Zen Cart 1.5.7
Affected Software: Zen Cart
Affected Versions: 1.5.7
Homepage: https://www.zen-cart.com/
Vulnerability: Cross-Site Scripting
Severity: High
Status: Fixed
CVSS Score (3.0): AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Netsparker Advisory Reference: NS-21-002

Technical Details
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Zen Cart 1.5.7 was improperly sanitizing user input in HTTP GET parameter names, which led to a Cross-Site Scripting (XSS) vulnerability in the admin area. The impact of this vulnerability is lessened due to the fact that the name of the admin panel must be set to a random or user-supplied name.

Resolution: The vulnerability is fixed in Zen Cart v1.5.7c.
Scope: It affected only users of Zen Cart v1.5.7, v1.5.7a, and v1.5.7b.
Fix: Users can consult the release announcement for guidance on applying the patched files related to upgrading to v1.5.7c

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

Advisory Timeline
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5th February 2021 - First Contact
21st April 2021 - Vulnerability Fixed
25th May 2021 - Advisory Released

Credits & Authors
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These issues have been discovered by Sven Morgenroth 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.