Information
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Advisory by Netsparker.
Name: XSS Vulnerability in miniBB
Affected Software : miniBB
Affected Versions: 3.1 and possibly below
Vendor Homepage : http://www.minibb.com
Vulnerability Type : SQL Injection
Severity : Critical
CVE-ID: CVE-2015-2261
Netsparker Advisory Reference : NS-15-005

Description
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If your web application is vulnerable to SQL injection, a hacker is able to execute any malicious SQL query or command through the web application.

Technical Details
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Proof of Concept URLs for SQL Injection vulnerability in miniBB:

Page: bb_admin.php
Parameter Name: selsub[]
Parameter Type: POST
Attack Pattern: (SELECT 1 FROM (SELECT SLEEP(25))A)

For more information on SQL Injection vulnerabilities read the article SQL Injection.

Advisory Timeline
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05/03/2015 - First Contact
10/04/2015 - Vulnerability fixed
14/04/2015 - Advisory released

Solution
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http://www.minibb.com/forums/news-9/minibb-3.1.1-has-been-released-6519.html

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

About Netsparker
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Netsparker 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 the technology they are built on. Netsparker's unique detection and exploitation techniques allow it to be dead accurate in reporting vulnerabilities, hence it is the first and only False Positive Free web application security scanner.