• Our team is looking to connect with folks who use email services provided by Plesk, or a premium service. If you'd like to be part of the discovery process and share your experiences, we invite you to complete this short screening survey. If your responses match the persona we are looking for, you'll receive a link to schedule a call at your convenience. We look forward to hearing from you!
  • The BIND DNS server has already been deprecated and removed from Plesk for Windows.
    If a Plesk for Windows server is still using BIND, the upgrade to Plesk Obsidian 18.0.70 will be unavailable until the administrator switches the DNS server to Microsoft DNS. We strongly recommend transitioning to Microsoft DNS within the next 6 weeks, before the Plesk 18.0.70 release.
  • The Horde component is removed from Plesk Installer. We recommend switching to another webmail software supported in Plesk.

Security issue: Reseller account pwd is exposed to customers

N

Nayabk

Guest
Hello Folks,
We just discovered a security flaw in Plesk and Sitebuilder. This needs to be addressed immediately as it can impact a lot of your customers including us.

Please install Fiddler or some other HTTP/HTTPS debugging proxy to see the problem.

Repro Steps:
Create a Reseller account in Plesk (lets say 'reseller1')
For this reseller create a new customer account (domain admin). Lets call him 'customer1'

Either go to a new machine or on this machine clear browser cookies, history etc. and log in as 'customer1' in Plesk.
Enable Fiddler to look at the browser traffic.
In Plesk go to 'SiteBuilder Wizard" for this customer.
In Fiddler look for a call to ExternalLogin.ashx. Look under Session Inspector->WebForms and you'll see the form's Post data including Login and Password. The login & password will be that of reseller1 and NOT customer1.

Folks, you've to take care of this immediately. You're exposing all reseller's passwords to their customers.
 
We could not reproduce this so far. Plesk uses the login of the exact user logged in now.
Could you please let us know the exact Plesk build number?
 
Back
Top