Wiz
Vulnerability DatabaseCVE-2020-14891

CVE-2020-14891: 
MySQL vulnerability analysis and mitigation

Overview

CVE-2020-14891 is a security vulnerability affecting the MySQL Server product, specifically in the Server: Optimizer component. The vulnerability affects MySQL Server versions 8.0.21 and prior (Oracle Advisory).

Technical details

The vulnerability has been assigned a CVSS 3.1 Base Score of 4.9 (MEDIUM) with the following vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. This indicates that the vulnerability requires network access and high privileges to exploit, but does not require user interaction (NetApp Advisory).

Impact

Successful exploitation of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server (NVD).

Exploitability

The vulnerability requires high privileges and network access to exploit. It is considered easily exploitable given these prerequisites are met (NetApp Advisory).

Mitigation and workarounds

Oracle has released patches to address this vulnerability in the October 2020 Critical Patch Update. Users should upgrade to the latest version of MySQL Server. For MySQL 8.0, users should upgrade to version 8.0.22 or later (Ubuntu Notice).

Additional resources

Source: This report was generated using AI

Related MySQL vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-63385CRITICAL9.2
  • MySQL logoMySQL
  • ntp
NoYesAug 20, 2026
CVE-2026-63384HIGH8.7
  • MySQL logoMySQL
  • libevent.src
NoYesAug 20, 2026
CVE-2026-63383HIGH8.7
  • MySQL logoMySQL
  • libevent2
NoYesAug 20, 2026
CVE-2026-63388HIGH8.4
  • MySQL logoMySQL
  • libevent2-doc
NoYesAug 20, 2026
CVE-2026-63387HIGH7
  • MySQL logoMySQL
  • libevent
NoYesAug 20, 2026

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Additional Wiz resources

Cloud Vulnerability DB

Cloud Vulnerability DB

A community-led vulnerabilities database

Cloud Threat Landscape

Cloud Threat Landscape

A threat intelligence database

PEACH

PEACH

A tenant isolation framework

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management
Get a demo