Update Antibot to 7.x-1.3
The OSU Online site (online.osu.edu) has had two spam attacks (on 3/7/24 and 3/25/24).
It looks as if there was a recent release for the Anitbot module (https://www.drupal.org/project/antibot/releases/7.x-1.3) which corrects a "critical issue" (https://www.drupal.org/project/antibot/issues/3422394). This may or not be what's causing these attacks but it's probably worth updating since the timing of the attacks seems suspiciously related.
In addition to the normal annoyances of spam attacks, the OSU Online site has some integrations with Salesforce which causes further cleanup issues. If this update could possibly stop or lessen any future attacks it'd be a huge help.