You need to use the find() method. In the docs, they show how to use it to expire sessions 10+ days old. You should modify it something like this (where $bad_user_id is the user you want to remove): 

CGI::Session->find( \&purge );
sub purge {
  my ($session) = @_;
  next if $session->is_empty;    # <-- already expired?!
  if ( ($session->param('user_id') eq $bad_user_id) ) {
    $session->delete();
    $session->flush(); 
  }
}

# now change password associated with $bad_user_id...

[download]

In reply to Re: how do I force a specific session, not my own, to end? by scorpio17
in thread how do I force a specific session, not my own, to end? by ted.byers

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