Ok, first I'm not giving you legal advise.
Yes, it is possible for a CC to lien your property, foreclose and have it sold at auction. Individual state laws vary on the process and the amount of “creditor exemption“ will also vary between 5,000 and 100,000.
It is rare for a CC company to do this because:
1. CC's are considered unsecured debt and CC Companies would be last in line after sale and subordinate to all secured debt holders.
2. Legal fees may exceed cost of debt after sale and or “creditor exemption“ amount may be more than value of property at which point there is no gain to foreclose for the CC company. (again state laws vary)
Consulting a lawyer in your state would be a great start to putting your mind at ease.