Last modified: 2014-06-13 23:29:36 UTC
Tag cohort functionality needs to check for ownership. Currently 'adding tags' to a cohort is only restricted because of the UI, since you are the only one that can see your cohort you are the only one that add tags to it but the "adding tag" functionality does not check for ownership.
Change 139566 had a related patch set uploaded by Terrrydactyl: Fix Bug 66483 https://gerrit.wikimedia.org/r/139566