W3C incident

503 on www.w3.org

Critical Resolved View vendor source →

W3C experienced a critical incident on December 5, 2025 affecting Website and User & Group Management and 1 more component, lasting 21m. The incident has been resolved; the full update timeline is below.

Started
Dec 05, 2025, 09:07 AM UTC
Resolved
Dec 05, 2025, 09:28 AM UTC
Duration
21m
Detected by Pingoru
Dec 05, 2025, 09:07 AM UTC

Affected components

WebsiteUser & Group ManagementTR PublicationEmail & Mailing ListsAPIValidation ServicesChapters

Update timeline

  1. investigating Dec 05, 2025, 09:07 AM UTC

    We are currently investigating this issue.

  2. investigating Dec 05, 2025, 09:08 AM UTC

    We are continuing to investigate this issue.

  3. monitoring Dec 05, 2025, 09:20 AM UTC

    Our website has been affected by a cloudflare issue. It is now back.

  4. resolved Dec 05, 2025, 09:28 AM UTC

    This incident has been resolved.