Secunia

Some vulnerabilities have been reported in Joomla!, which can be exploited by malicious people to bypass certain security restrictions and disclose potentially sensitive information.

1) An unspecified error in LDAP can be exploited to gain unauthorized access to the administration section.

2) An unspecified error within file caching can be exploited to gain unauthorized access to cached pages.

NOTE: A fix regarding User Redirect Spam and a security enhancement to the .htaccess file has also been reported.

The vulnerabilities are reported in versions prior to 1.5.4.

Solution
Update to version 1.5.4.
Further details available in Customer Area

Provided and/or discovered by
Reported by the vendor.

Changelog
Further details available in Customer Area

Original Advisory
http://www.joomla.org/content/view/5180/1/

Deep Links
Links available in Customer Area