Unspecified vulnerability in Joomla! before 1.0.10 has unknown impact and attack vectors, related to "securing mosmsg from misuse." NOTE: it is possible that this issue overlaps CVE-2006-1029.

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.