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Widespread cPanel Login Failures Since August 8 - Multiple Providers Affected
Issue Overview: Starting August 8, 2025, I’ve encountered persistent cPanel login failures across all my servers (reseller and personal, totaling 5), and my competitor’s servers are also impacted. Clients report "login failed" with valid credentials, yet WHM API/SSO logins via WHMCS succeed. Resetting passwords (even to the same value) temporarily resolves it, but the issue recurs after a few days, often leading to IP blocks from repeated attempts.(causing extreme load on technical team handling the clients).
Details:
Start Date: August 8, 2025.
Affected Systems: All my cPanel servers (WHM v130.0.3) some are also on the whm v126, plus competitor servers.( no any WHM server is unaffected, more than 10 including my competitors)
OS: Cloudlinux
Symptoms: Direct cPanel logins fail, WHMCS SSO works, password resets overwrite the issue temporarily.
Attempts: Disabled cPHulk username protection,
Hypothesis: Suspect a bug from the August 7, 2025, Site Quality Monitoring 2.0.0-2 update or a related dependency, given the timing and widespread impact. No cPHulk locks or local hardware issues explain this across multiple providers.
Request: Please investigate urgently—multiple hosting providers are hit, suggesting a systemic cPanel issue. Any rollback guidance or patch ETA would help.
There must be more user out their facing this issue, are you?
Comments
We have received some client complaint. Password are showing invalid from client end but same password are working fine on our end.