CVE-2024-30053 is a Cross-Site Scripting (XSS) vulnerability identified in Microsoft Azure Migrate version 1.0.0. The vulnerability stems from improper neutralization of input during web page generation, classified under CWE-79. Specifically, this flaw allows an attacker with low privileges (PR:L) to inject malicious scripts into web pages served by Azure Migrate without requiring any user interaction (UI:N). The vulnerability is remotely exploitable over the network (AV:N) with low attack complexity (AC:L), and it does not require elevated privileges beyond low-level access. The vulnerability impacts confidentiality (C:H) but does not affect integrity or availability. The CVSS 3.1 base score is 6.5, indicating a medium severity level. The exploitability is partially confirmed (E:P), and the remediation level is official (RL:O) with confirmed fix (RC:C), although no patch links are currently provided. No known exploits are reported in the wild at this time. The vulnerability could allow an attacker to execute arbitrary scripts in the context of the victim’s browser session when accessing Azure Migrate, potentially leading to theft of sensitive information such as authentication tokens or session cookies. Since Azure Migrate is a cloud migration assessment tool used to plan and manage migration of on-premises workloads to Azure, this vulnerability could be leveraged to compromise migration data confidentiality or facilitate further attacks within an enterprise environment.

For European organizations, the impact of this vulnerability could be significant, especially for enterprises relying on Azure Migrate for cloud migration projects. The confidentiality breach could expose sensitive migration plans, credentials, or configuration data, potentially leading to unauthorized access to cloud resources or disruption of migration workflows. Given the medium severity and the fact that no user interaction is required, attackers could automate exploitation against vulnerable instances exposed to the internet or internal networks. This could result in data leakage or lateral movement within corporate networks. Organizations in regulated sectors such as finance, healthcare, and critical infrastructure may face compliance risks if sensitive data is exposed. Additionally, the breach of migration-related data could delay cloud adoption initiatives, impacting business continuity and operational efficiency.

1. Immediate mitigation should include restricting access to Azure Migrate interfaces to trusted internal networks and enforcing strict network segmentation to limit exposure. 2. Implement Web Application Firewall (WAF) rules to detect and block suspicious input patterns indicative of XSS attacks targeting Azure Migrate endpoints. 3. Monitor logs for unusual or unexpected input parameters that could indicate attempted exploitation. 4. Apply the official patch or update from Microsoft as soon as it becomes available; in the meantime, consider disabling or limiting the use of Azure Migrate 1.0.0 where feasible. 5. Employ Content Security Policy (CSP) headers to reduce the impact of potential script injection by restricting the sources of executable scripts. 6. Conduct security awareness training for administrators managing Azure Migrate to recognize and respond to potential exploitation attempts. 7. Regularly review and sanitize all user-supplied input in custom integrations or automation scripts interfacing with Azure Migrate to prevent injection of malicious content.