XSS in bookmarks plugin

The bookmarking code under the url

http://localhost:8080/plugins/socialbookmarking/updatebookmark.action

is vulnerable to XSS attacks using the spaceKey parameter:

submitting the following code will execute javascript:

spaceKey=%22%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E%22%3E

IMPORTANT: please confirm receipt of this notification! Depending on the response, we may report the
vulnerability to publicly available security forums such as CERT (www.cert.org). Our policy is to give
you at least 30 days grace period prior to any public disclosure.