4Schools incident
DDoS Attack Against Mass Notification Service Provider
Resolved after 2 days 22 hours, affecting CMS4Schools Mass Notifications, on January 9, 2026.
A fix has been implemented and are monitoring carefully.
Affected components
Update timeline
- identified Jan 09, 2026, 03:51 PM UTC
Our underlying provider for mass notifications (email, text, phone, and chat) is currently experiencing a Distributed Denial of Service (DDoS) attack. This attack is leveraging a high volume of rotating IP addresses to generate excessive traffic against publicly accessible resources. We're in active communication with them as their engineering and security teams work to mitigate the impact.
- identified Jan 09, 2026, 05:16 PM UTC
Messages containing URL links, images, or attachments (including newsletters and report emails) may not send successfully or may not be viewable by recipients. Chats may take longer than normal or fail to send. Core messaging remains operational, but these may be intermittently impacted while mitigation is in progress for DDoS attacks.
- monitoring Jan 10, 2026, 05:57 PM UTC
A fix has been implemented and are monitoring carefully.
- resolved Jan 12, 2026, 02:16 PM UTC
This incident has been resolved.
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