Secunia

DarkFig has discovered a vulnerability in @lex Guestbook, which can be exploited by malicious people to conduct SQL injection attacks.

Input passed to the "lang" parameter in index.php is not properly sanitised before being used in SQL queries. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.

Successful exploitation allows retrieval of any username or password, but requires that "magic_quotes_gpc" is disabled.

The vulnerability is confirmed in version 4.0.2. Other versions may also be affected.

Solution
Upgrade to version 5.0.2 or later.

Provided and/or discovered by
DarkFig

Changelog
Further details available in Customer Area

Original Advisory
http://acid-root.new.fr/poc/20070107.txt

Deep Links
Links available in Customer Area