Illustrative Mathematics incident

Cloudflare blocking users on illustrativemathematics.org and illustrativemathematics.blog intermittently

Notice Resolved View vendor source →

Illustrative Mathematics experienced a notice incident on October 27, 2025 affecting IM Website (uptime monitoring) and IM Blog (uptime monitoring), lasting 15h 53m. The incident has been resolved; the full update timeline is below.

Started
Oct 27, 2025, 10:20 PM UTC
Resolved
Oct 28, 2025, 02:14 PM UTC
Duration
15h 53m
Detected by Pingoru
Oct 27, 2025, 10:20 PM UTC

Affected components

IM Website (uptime monitoring)IM Blog (uptime monitoring)

Update timeline

  1. investigating Oct 27, 2025, 10:20 PM UTC

    We are currently investigating this issue.

  2. investigating Oct 27, 2025, 10:21 PM UTC

    We are aware the users are experiencing intermittent issues accessing the site due to a CloudFlare block warning. We are investigating and recommend that users re-try the site if they receive the error or clear their cache if the issues persists for them.

  3. investigating Oct 27, 2025, 10:39 PM UTC

    Update: the issue lies with a 3rd party service and we are awaiting for their teams to address the issue. Engineering is monitoring status updates and will notify the organization once we have more information.

  4. resolved Oct 28, 2025, 02:14 PM UTC

    Resolved: last night, the web hosting company for illustrativemathematics.org and illustrativemathematics.blog resolved an issue with their security feature that was preventing users from accessing those websites.