VDB
CVE-2021-2020
CVE-2021-2020
PUBLISHED
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 1.77% · 83.0th percentile
Risk Scores
EPSS Score
1.77%
83.0th 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 |
Exploit Intelligence
Timeline
- Jan 19, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jan 11, 2023 CVE Updated
- Mar 7, 2023 EPSS Score
- Mar 17, 2025 EPSS Score
- Mar 29, 2025 EPSS Score
- Mar 30, 2025 EPSS Score
- May 1, 2025 EPSS Score
- May 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