CVE-2025-21529 is a medium-severity vulnerability identified in the Oracle MySQL Server product, particularly affecting the Information Schema component. The vulnerability is present in supported versions of the MySQL Server, specifically 8.0.40 and prior, 8.4.3 and prior, and 9.1.0 and prior. This vulnerability allows an attacker with high privileges and network access through various protocols to exploit the MySQL Server.
The risk to organizations includes the potential for unauthorized access that could lead to a denial of service (DoS) through frequent crashes or hangs of the MySQL Server. The CVSS 3.1 base score for this vulnerability is 4.9, highlighting its significant impact on availability.
Organizations should prioritize patching immediately, as the affected versions could be easily exploited by attackers. The urgency of remediation is underscored by the nature of the vulnerability, which can be leveraged without user interaction.
As of now, there are no public exploits confirmed for this vulnerability, but the potential for exploitation remains a concern. Therefore, organizations using affected versions of MySQL Server must take immediate steps to address this vulnerability.
Vulnerability Details
The vulnerability allows high privileged attackers to compromise MySQL Server, resulting in unauthorized ability to cause a hang or repeated crash. The official CVE description highlights that the vulnerability impacts availability, leading to a CVSS score of 4.9.
Technical Analysis
The root cause of the vulnerability is linked to the MySQL Server configuration, which may allow high privileged access over the network. The attack vector is network-based, with low complexity and high privileges required for an attacker. User interaction is not necessary for exploitation.
Risk & Impact Analysis
Organizations utilizing affected MySQL Server versions face a significant risk of service disruption. The blast radius could extend to critical applications relying on MySQL for data management. The vulnerability’s CVSS score indicates a medium severity, and with exploitation potential, organizations should assess the urgency of their patching strategies.
Exploitation Status
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 plan for immediate remediation.
Mitigation & Remediation
To mitigate the risks associated with CVE-2025-21529, organizations should apply the latest security updates provided by Oracle. Ensure to upgrade to versions beyond 8.0.40, 8.4.3, and 9.1.0. If patches are unavailable, consider implementing network controls to limit access to the MySQL Server and monitor for unusual behavior.
Detection Guidance
Monitoring logs for unauthorized access attempts and unusual server behavior is crucial. Behavioral anomalies indicating potential exploitation should be investigated. Reviewing system changes and network signatures can aid in detection.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-21529 highlights the need for organizations to maintain robust patch management practices. This vulnerability represents a common theme in networked services where low complexity attacks can lead to significant availability impacts.
Security teams should regularly review their vulnerability management programs to stay ahead of such threats. Implementing continuous penetration testing strategies can help identify and remediate vulnerabilities before they are exploited.
For more information on effective mitigation strategies, organizations can refer to our guide on penetration testing practices.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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