Board Thread:Support Requests - Community Management/@comment-29460876-20170526194805/@comment-27345308-20170526204842

Yes. There is no option in AbuseFilter to make a block temporary. I use AbuseFilter on Undertale Wiki and it's either block for infinite or not block at all. AbuseFilter temporary blocks don't exist even in vanilla MediaWiki and most likely won't be implemented anytime soon.

You can contact the administrators of that wiki over Community Central to unblock you if you think your block is incorrect.