CVE-2018-3066: Medium severity Oracle MySQL vulnerability
Last updated 18 August 2025
Other sources
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Options). Supported versions that are affected are 5.5.60 and prior, 5.6.40 and prior and 5.7.22 and prior. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of MySQL Server accessible data as well as unauthorized read access to a subset of MySQL Server accessible data.
External References:
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
— Red Hat
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Options). Supported versions that are affected are 5.5.60 and prior, 5.6.40 and prior and 5.7.22 and prior. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of MySQL Server accessible data as well as unauthorized read access to a subset of MySQL Server accessible data. CVSS 3.0 Base Score 3.3 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N).
— Launchpad
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2018-3066?
CVE-2018-3066 is classified as a difficult to exploit vulnerability with a high potential for privilege escalation.
How do I fix CVE-2018-3066?
To mitigate CVE-2018-3066, upgrade MySQL to version 5.5.61, 5.6.41, or 5.7.23, or apply the appropriate patches.
Which versions of MySQL are vulnerable to CVE-2018-3066?
Versions 5.5.60 and earlier, 5.6.40 and earlier, and 5.7.22 and earlier of MySQL are vulnerable to CVE-2018-3066.
Is MariaDB affected by CVE-2018-3066?
Yes, certain versions of MariaDB are affected, specifically versions up to 5.5.61 and various versions within the 10.x range.
What types of attacks can exploit CVE-2018-3066?
CVE-2018-3066 allows high privileged attackers to perform unauthorized actions on affected MySQL Server installations.