CVE-2025-50093 is a vulnerability identified in Oracle Corporation's MySQL Server affecting versions 8.0.0 through 8.0.42, 8.4.0 through 8.4.5, and 9.0.0 through 9.3.0. The vulnerability resides in the Server: DDL component and allows a high-privileged attacker with network access via multiple protocols to exploit the flaw. The attack vector is network-based (AV:N), requires low attack complexity (AC:L), but demands high privileges (PR:H) and no user interaction (UI:N). The scope remains unchanged (S:U), and the impact affects availability only (A:H), with no impact on confidentiality or integrity. Exploitation can cause the MySQL Server to hang or crash repeatedly, resulting in a denial-of-service (DoS) condition. The vulnerability is classified under CWE-400, which relates to uncontrolled resource consumption leading to DoS. The CVSS 3.1 base score is 4.9, indicating a medium severity level. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability is easily exploitable by attackers with existing high privileges and network access, making it a significant concern for environments where MySQL servers are critical to operations. The lack of confidentiality or integrity impact limits the threat to service availability, but given MySQL's widespread use in enterprise applications, this can still cause substantial operational disruption.

For European organizations, the impact of CVE-2025-50093 can be significant, particularly for those relying heavily on MySQL Server for critical business applications, data storage, and web services. A successful DoS attack can lead to service outages, affecting business continuity, customer experience, and potentially causing financial losses. Industries such as finance, e-commerce, healthcare, and public sector entities that depend on database availability are especially vulnerable. The requirement for high privileges to exploit the vulnerability somewhat limits the attack surface to insiders or attackers who have already compromised privileged credentials. However, once exploited, the repeated crashes or hangs can disrupt operations and may require emergency response and recovery efforts. The absence of confidentiality or integrity impact reduces risks related to data breaches but availability impact alone can still cause severe operational challenges. Additionally, the multi-protocol network access vector means that various network interfaces could be exploited, increasing the risk in complex network environments.

1. Immediate mitigation should focus on restricting network access to MySQL Server instances to trusted and necessary hosts only, using network segmentation and firewall rules to limit exposure. 2. Enforce strict access controls and privilege management to ensure that only authorized users have high-level privileges on MySQL servers. 3. Monitor MySQL server logs and network traffic for unusual activity that could indicate attempts to exploit this vulnerability, such as repeated connection attempts or abnormal query patterns. 4. Implement resource usage monitoring and automated alerts to detect early signs of resource exhaustion or server hangs. 5. Prepare incident response plans specifically for MySQL service disruptions, including rapid failover or restart procedures to minimize downtime. 6. Stay updated with Oracle's security advisories for the release of patches or workarounds and prioritize timely application of any available fixes. 7. Consider deploying MySQL servers in high-availability configurations to reduce the impact of potential DoS conditions. 8. Conduct regular security audits and penetration testing focusing on privilege escalation and network access controls to prevent attackers from gaining the required high privileges.