Via lwn.net, I came across https://www.drupal.org/PSA-2014-003 and my heart sank:
""" Automated attacks began compromising Drupal 7 websites that were not patched or updated to Drupal 7.32 within hours of the announcement of SA-CORE-2014-005 - <https://www.drupal.org/SA-CORE-2014-005>Drupal <https://www.drupal.org/SA-CORE-2014-005> core - SQL injection <https://www.drupal.org/SA-CORE-2014-005>. You should proceed under the assumption that every Drupal 7 website was compromised unless updated or patched before Oct 15th, 11pm UTC, that is 7 hours after the announcement. """ That's about as bad as it gets, folks.