admin/user/create_user.php in Kolab Groupware Server 1.0.0 places a user password in an HTTP GET request, which allows local administrators, and possibly remote attackers, to obtain cleartext passwords by reading the ssl_access_log file or the referer string.

Kolab Server 2.0.1, 2.0.2 and development versions pre-2.1-20051215 and earlier, when authenticating users via secure SMTP, stores authentication credentials in plaintext in the postfix.log file, which allows local users to gain privileges.

Kolab Server 2.0.0 and 2.0.1 does not properly handle when a large email is sent with a "." in the wrong place, which causes kolabfilter to add another ".", which might break clear-text signatures and attachments. NOTE: it is not clear whether this issue crosses privilege boundaries, so this might not be a vulnerability.

Kolab stores OpenLDAP passwords in plaintext in the slapd.conf file, which may be installed world-readable, which allows local users to gain privileges.