Which of the following BEST describes the security concerns when hosting web applications in the cloud?

The choice stating that the cloud vendor is a new attack vector within the supply chain accurately highlights a critical security concern when hosting web applications in the cloud. When an organization utilizes cloud services, it relies on the security measures and infrastructure provided by the vendor. If the vendor is compromised or has vulnerabilities, it could serve as a gateway for attackers to access sensitive data or exploit weaknesses within the organization's hosted applications. This introduces a level of risk associated with dependency on third-party providers.

In the context of cloud security, understanding the vendor's security posture, the implementation of security controls, and the potential for these providers to be targeted by attackers is essential. This concern forms a part of the broader supply chain risk, as organizations are not only responsible for their own security but must also assess and manage risks associated with their service providers and partners.

The other options highlight relevant security concerns but are less comprehensive regarding how vendor interaction represents a significant angle of risk. For example, while exposing servers to other cloud-provider clients is a concern, this scenario is typically mitigated by proper multitenancy architecture and appropriately configured access controls. Similarly, outsourcing code development does introduce risks, but the primary challenge here is prioritizing effective vendor risk management. Lastly, the issue of vendor support ce