ColoCrossing Data Breach

What happened

In May 2025, hosting provider ColoCrossing identified a data breach that impacted customers of their ColoCloud virtual server product. ColoCrossing advised the incident was isolated to their cloud/VPS platform and stemmed from a single sign-on vulnerability. 7k email addresses were exposed in the incident along with names and MD5-Crypt password hashes.

Exposed data

Recommended actions

• Change your ColoCrossing password immediately, and update it anywhere you reused the same password.
• Enable two-factor authentication on the affected account and on your critical services (email, banking).
• Watch for targeted phishing emails referencing ColoCrossing — attackers weaponise breach data quickly.
• Check whether your email address appears in this breach on haveibeenpwned.com.