ColoCrossing data breach: 7183 accounts exposed
Severity: high · Patch status: no-fix-needed · Since 2025-06-03
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: email addresses, names, passwords. The breach dates from May 24, 2025; Have I Been Pwned loaded it on Jun 3, 2025.
What to do
- If you had a ColoCrossing account, change its password and the password of any other account that reused it.
- Turn on multi-factor authentication wherever it is offered.
- Check whether your addresses are in this breach at https://haveibeenpwned.com.
- Expect targeted phishing that quotes the leaked details; verify any unexpected contact out of band.
Sources
All live incidents on Threat Watch