anlgform.pl in Analog before 5.23 does not restrict access to the PROGRESSFREQ progress update command, which allows remote attackers to cause a denial of service (disk consumption) by using the command to report updates more frequently and fill the web server error log.
Cross-site scripting vulnerability in analog before 5.22 allows remote attackers to execute Javascript via an HTTP request containing the script, which is entered into a web logfile and not properly filtered by analog during display.