libraries/auth/swekey/swekey.auth.lib.php in the Swekey authentication feature in phpMyAdmin 3.x before 3.3.10.2 and 3.4.x before 3.4.3.1 assigns values to arbitrary parameters referenced in the query string, which allows remote attackers to modify the SESSION superglobal array via a crafted request, related to a "remote variable manipulation vulnerability."
setup/lib/ConfigGenerator.class.php in phpMyAdmin 3.x before 3.3.10.2 and 3.4.x before 3.4.3.1 does not properly restrict the presence of comment closing delimiters, which allows remote attackers to conduct static code injection attacks by leveraging the ability to modify the SESSION superglobal array.
libraries/server_synchronize.lib.php in the Synchronize implementation in phpMyAdmin 3.x before 3.3.10.2 and 3.4.x before 3.4.3.1 does not properly quote regular expressions, which allows remote authenticated users to inject a PCRE e (aka PREG_REPLACE_EVAL) modifier, and consequently execute arbitrary PHP code, by leveraging the ability to modify the SESSION superglobal array.