VDB
CVE-2021-2020
CVE-2021-2020
PUBLISHED
CVSS 6.5 MEDIUM
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.20 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
EPSS 2.94% · 86.6th percentile
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score
2.94%
86.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:16.04:LTS | percona-server-5.6 | 0, 5.6.22-rel71.0-0ubuntu2, 5.6.22-rel71.0-0ubuntu4 |
| Ubuntu:14.04:LTS | mysql-5.5 | 5.5.52-0ubuntu0.14.04.1, 5.5.35-0ubuntu1, 5.5.35+dfsg-1ubuntu1 |
| Ubuntu:20.04:LTS | mysql-8.0 | 8.0.17-0ubuntu2, 8.0.17-0ubuntu3, 8.0.18-0ubuntu3 |
| Ubuntu:16.04:LTS | percona-xtradb-cluster-5.6 | 5.6.21-25.8-0ubuntu3, 5.6.21-25.8-0ubuntu3.1, 5.6.21-25.8-0ubuntu3.2 |
Timeline
- Sep 14, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Mar 7, 2023 EPSS Score
- Mar 17, 2025 EPSS Score
- Mar 29, 2025 EPSS Score
- Mar 30, 2025 EPSS Score
- May 4, 2025 EPSS Score
- Jun 1, 2025 EPSS Score
- Jun 4, 2025 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-2020 third-party-advisory
- https://www.oracle.com/security-alerts/cpujan2021.html third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-2020 third-party-advisory