Joomla! 1.5 before 1.5.7 initializes PHP's PRNG with a weak seed, which makes it easier for attackers to guess the pseudo-random values produced by PHP's mt_rand function, as demonstrated by guessing password reset tokens, a different vulnerability than CVE-2008-3681.
The mailto (aka com_mailto) component in Joomla! 1.5 before 1.5.7 sends e-mail messages without validating the URL, which allows remote attackers to transmit spam.
Multiple open redirect vulnerabilities in Joomla! 1.5 before 1.5.7 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a "passed in" URL.
JRequest in Joomla! 1.5 before 1.5.7 does not sanitize variables that were set with JRequest::setVar, which allows remote attackers to conduct "variable injection" attacks and have unspecified other impact.
Joomla! before 1.5.4 allows attackers to access administration functionality, which has unknown impact and attack vectors related to a missing "LDAP security fix."
Unspecified vulnerability in Joomla! before 1.5.4 has unknown impact and attack vectors related to a "User Redirect Spam fix," possibly an open redirect vulnerability.
Joomla! before 1.5.4 does not configure .htaccess to apply certain security checks that "block common exploits" to SEF URLs, which has unknown impact and remote attack vectors.
PHP remote file inclusion vulnerability in facileforms.frame.php in the FacileForms (com_facileforms) component 1.4.4 for Mambo and Joomla! allows remote attackers to execute arbitrary PHP code via a URL in the ff_compath parameter.