The Crimsonplague have a certain disadvantage when it comes to their metallic attributes. Silver, serves as aggrivated damage to them, and will burn as if it touched a werewolf. Silver burns their skin in an irritation which will take longer to heal then most wounds. Should bullet's enter their body, it will burn badly until they pull them out. They will not be able to dissolve them like normal.
As a side note, when useing the Metaloid discipline, they are highly susceptable to magnetism & electrical currents. This side note is only when they use the Metaloid discipline. Do to their zombie like bodies, at any other time, electricity will just stun them a bit, even at the strongest of currents. Though it is not a weakness, the Crimsonplague always feel a strong hatred towards those of highly religious stature. True Faith slayers have a strong affect on them, for they feel a devine mission to eradicate them. Holy ground causes them an uneasy feeling which will most likely repel them. Crossess of any make, just so long as they are of the Christian faith will repel them slightly.