Kenneth F. Belva has discovered a vulnerability in Simple PHP Blog, which can be exploited by malicious people to manipulate sensitive information.

Input passed to the "comment" parameter in "comment_delete_cgi.php" isn't properly verified before being used to delete comments. This can be exploited to delete arbitrary files.

This can further be exploited to change the administrator's username and password by deleting the "config/password.txt" password file and accessing the "install03_cgi.php" installation script.

The vulnerability is confirmed in version 0.4.0. Other versions may also be affected.

Solution
Update to version 0.5.1.

Provided and/or discovered by
Kenneth F. Belva

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