CVE-2025-21519 is a vulnerability in the MySQL Server product of Oracle MySQL, impacting supported versions 8.0.40 and prior, 8.4.3 and prior, and 9.1.0 and prior. This vulnerability allows a high-privileged attacker with network access via multiple protocols to compromise the MySQL Server. The vulnerability is classified as medium severity, with a CVSS 3.1 base score of 4.4, indicating significant availability impacts.
Successful attacks exploiting this vulnerability may result in unauthorized ability to cause a hang or frequently repeatable crash of the MySQL Server, leading to a complete denial-of-service (DOS) condition. Organizations should prioritize patching this vulnerability to prevent potential disruptions and maintain service availability.
Currently, no public exploit has been confirmed for this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) catalog. Nevertheless, organizations should remain vigilant and implement recommended mitigation strategies to safeguard their systems.
Organizations should prioritize patching immediately.
Vulnerability Details
The vulnerability in question relates to the MySQL Server component focusing on security privileges. It can be exploited by high-privileged attackers with network access, allowing them to cause significant disruptions. The CVSS vector for this vulnerability is (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H), with an emphasis on high availability impact.
Technical Analysis
The root cause stems from the way privileges are handled in the MySQL Server, which can be manipulated by attackers with high privileges. The attack vector is primarily network-based, requiring low complexity for exploitation due to high privileges being necessary. There is no user interaction required for an attack to succeed, and the attack impacts the availability of the system.
Risk & Impact Analysis
The potential risks associated with CVE-2025-21519 include significant downtime for services reliant on MySQL Server, leading to loss of business continuity and potential data loss. The vulnerability's medium CVSS score indicates that while it is not among the most critical threats, it can still have considerable impacts on organizations that fail to address it. The availability impact highlights the need for immediate action to mitigate any potential disruptions.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of MySQL Server include 8.0.40 and prior, 8.4.3 and prior, and 9.1.0 and prior. Organizations using these versions should prioritize applying available patches to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
To remediate CVE-2025-21519, organizations must apply patches provided by Oracle. For those unable to immediately implement patches, it is recommended to implement additional security controls such as network segmentation and monitoring for unusual activity on MySQL Server instances. Organizations should validate remediation through continuous penetration testing to ensure that all vulnerabilities have been effectively addressed.
Detection Guidance
To detect potential exploitation attempts related to this vulnerability, organizations should monitor logs for unusual access patterns, particularly from high-privileged accounts. Behavioral anomalies such as unexpected crashes or service interruptions of MySQL Server should also be investigated promptly.
AppSecure Threat Intelligence Insight
The emergence of vulnerabilities like CVE-2025-21519 underscores the need for organizations to adopt proactive security measures. Regular updates and patch management should be integral parts of an organization's cybersecurity strategy. For more insights, organizations can explore our penetration testing methodology and consider implementing a vulnerability management program to enhance their security posture. Additionally, organizations should remain informed about emerging trends in cybersecurity by reviewing relevant resources such as our cloud security statistics to better understand the evolving threat landscape.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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