run.cgi in Webmin 0.80 and 0.88 creates temporary files with world-writable permissions, which allows local users to execute arbitrary commands.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-1507
http://www.securiteam.com/unixfocus/6R00M0K2UC.html
http://archives.neohapsis.com/archives/vulnwatch/2001-q4/0015.html