A vulnerability has been discovered in the Follower User plugin for MyBB, which can be exploited by malicious users to conduct SQL injection attacks.
Input passed via the "usid" parameter to misc.php (when "uid" is set to the current user id and "suscriberuser" is set to "yes") is not properly sanitised in the "SuscribeUsers_add()" function (inc/plugins/SuscribeUsers.php) before being used in a SQL query. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.
The vulnerability is confirmed in version 1.5. Other versions may also be affected.
Solution: No official solution is currently available.
Provided and/or discovered by: Th3FreakPony
Original Advisory: Th3FreakPony:
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Subject: MyBB Follower User Plugin "usid" SQL Injection Vulnerability
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