https://bugzilla.wikimedia.org/show_bug.cgi?id=19010

           Summary: It is possible to make brute force login attack to not
                    global account
           Product: MediaWiki extensions
           Version: any
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: Normal
         Component: CentralAuth
        AssignedTo: [email protected]
        ReportedBy: [email protected]


This is a security risk for old (not used for now) administrator accounts!

An attack schema on an not global account called "nnn" on the wiki "iii":
1) I create an account called "nnn" at several wikis
2) I convert an account "nnn" to global account
3) I tries to join the "nnn" in the wiki "iii" to my global account - no
restrictions on the number of unsuccessful attempts, no captcha


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