Information
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Advisory by Netsparker (now Invicti)
Name: Cross-site Scripting Vulnerabilities in FluxBB 1.5.10
Affected Software: FluxBB
Affected Versions: 1.5.10
Homepage: https://fluxbb.org/
Vulnerability: Cross-site Scripting
Severity: High
Status: Fixed
CVE-ID: CVE-2018-13148
CVSS Score (3.0): CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Invicti Advisory Reference: NS-18-047

Technical Details
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URL http://app.scan/ScanApp/fluxbb-1.5.10-install/install.php
Parameter Name req_db_host
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>netsparker(0x002883)</scRipt>

URL http://app.scan/ScanApp/fluxbb-1.5.10-install/install.php
Parameter Name db_username
Parameter Type POST
Attack Pattern '><scRipt>netsparker(9)</scRipt>

URL http://app.scan/ScanApp/fluxbb-1.5.10-install/install.php
Parameter Name req_default_style
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>netsparker(0x002D7C)</scRipt>

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

Advisory Timeline
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15th November 2017 - First Contact
13th January 2018 - Vendor Fixed
11th January 2019 - Advisory Released

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

About Invicti
--------------------

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.