The LDAP authentication feature in XLight FTP Server before 2.83, when used with some unspecified LDAP servers, does not check for blank passwords, which allows remote attackers to bypass intended access restrictions.

Xlight 1.52, with log to screen enabled, allows remote attackers to cause a denial of service by requesting a long directory consisting of . (dot) and / (slash) characters, which causes the server to crash when the administrator views the log file, possibly triggering a buffer overflow.

Xlight FTP server 1.52 allows remote authenticated users to cause a denial of service (crash) via a RETR command with a long argument containing a large number of / (slash) characters, possibly triggering a buffer overflow.