We have reports from bloggers that there is new spam in town - pingback spam. Here is what you can do to stop it.
1. Disable
Go to admin/settings/advanced and remove check mark in "enable pingbacks" and "enable trackbacks" opting to not receive them.
2. Patch
Spammers used flaw in the white list logic that allowed any user who already posted number of comments on the blog to bypass validation ...
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