1. A method for prioritizing vulnerabilities of a specific asset deployed by an organization in a specific virtual computing environment, performed by a processor-based contextual vulnerabilities prioritization system, comprising: determining a vulnerability score for the specific asset, based on a CVSS (common vulnerability scoring system) score or other base vulnerability score or temporal vulnerability score, wherein the specific asset is a virtual machine or virtual application that is implemented using physical computing components in the specific virtual computing environment; receiving information about a threat; correlating the information about the threat with information about the specific asset based upon environmental factors of the specific asset to determine a threat score for the specific asset, wherein the environmental factors include characteristics of a customer associated with the specific asset, characteristics of the specific asset relative to the threat, and characteristics of a workload distribution relative to the threat; determining a contextual score for the specific asset based on at least one tag of the specific asset; and deriving a prioritization score for the specific asset, the prioritization score a combination of the vulnerability score, the threat score and the contextual score, the prioritization score representing a prioritizing, specific to the specific asset, of a context-dependent vulnerability of the specific asset to the threat.