phpMyAdmin before 2.11.5.1 stores the MySQL (1) username and (2) password, and the (3) Blowfish secret key, in cleartext in a Session file under /tmp, which allows local users to obtain sensitive information.
https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00080.html
https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00031.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/41541
http://www.phpmyadmin.net/home_page/security.php?issue=PMASA-2008-2
http://www.debian.org/security/2008/dsa-1557
http://sourceforge.net/tracker/index.php?func=detail&aid=1909711&group_id=23067&atid=377408
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00002.html