Joomla : Security Vulnerabilities (Denial of service)

Unspecified vulnerability in Joomla! before 2.5.4 before 2.5.26, 3.x before 3.2.6, and 3.3.x before 3.3.5 allows attackers to cause a denial of service via unspecified vectors.

plugins/system/remember/remember.php in Joomla! 2.5.x before 2.5.10 and 3.0.x before 3.0.4 does not properly handle an object obtained by unserializing a cookie, which allows remote authenticated users to conduct PHP object injection attacks and cause a denial of service via unspecified vectors.

The com_rss option (rss.php) in (1) Mambo and (2) Joomla! allows remote attackers to cause a denial of service (disk consumption and possibly web-server outage) via multiple requests with different values of the feed parameter.

The cross-site scripting (XSS) countermeasures in class.inputfilter.php in Joomla! 1.0.7 allow remote attackers to cause a denial of service via a crafted mosmsg parameter to index.php with a malformed sequence of multiple tags, as demonstrated using "<<>AAA<><>", possibly due to nested or empty tags.

feedcreator.class.php (aka the syndication component) in Joomla! 1.0.7 allows remote attackers to cause a denial of service (stressed file cache) by creating many files via filenames in the feed parameter to index.php.

Joomla! 1.03 does not restrict the number of "Search" Mambots, which allows remote attackers to cause a denial of service (resource consumption) via a large number of Search Mambots.