Editing Wiki (section)

==== Harmful external links ====

As most wikis allow the creation of hyperlinks to other sites and services, the addition of malicious hyperlinks, such as sites infected with [[malware]], can also be a problem. For example, in 2006 a German Wikipedia article about the [[Blaster Worm]] was edited to include a hyperlink to a malicious website, and users of vulnerable Microsoft Windows systems who followed the link had their systems infected with the worm.<ref name=Legal/> Some wiki engines offer a [[Blacklist (computing)|blacklist]] feature which prevents users from adding hyperlinks to specific sites that have been placed on the list by the wiki's administrators.