Lostmon has discovered some vulnerabilities in class-1 Forum Software, which can be exploited by malicious people to conduct cross-site scripting and SQL injection attacks.
1) Input passed to the "group" parameter in "users.php" isn't properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of a vulnerable site.
2) Input passed to the "id" parameter in "viewattach.php", the "group" and "viewuser_id" parameters in "users.php", and the "id" , "mode", and "forum" parameters in "viewforum.php" isn't properly sanitised before being used in a SQL query. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.
The vulnerabilities have been confirmed in version 0.24.4. Version 0.23.2 is reportedly also vulnerable, and other versions may also be affected.
Solution: Edit the source code to ensure that input is properly sanitised.
Provided and/or discovered by: Lostmon
Additional information provided by r0t.
Original Advisory: r0t:
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Subject: class-1 Forum Software Cross-Site Scripting and SQL Injection
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