Vulnerability Database

289,599

Total vulnerabilities in the database

CVE-2021-20330

An attacker with basic CRUD permissions on a replicated collection can run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries. This issue affects MongoDB Server v4.0 versions prior to 4.0.27; MongoDB Server v4.2 versions prior to 4.2.16; MongoDB Server v4.4 versions prior to 4.4.9.

  • Published: Dec 15, 2021
  • Updated: May 4, 2025
  • CVE: CVE-2021-20330
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.5
  • AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 4
  • AV:N/AC:L/Au:S/C:N/I:N/A:P

CWEs:

Software From Fixed in
mongodb / mongodb 4.4.0 4.4.6
mongodb / mongodb 4.0.0 4.0.25
mongodb / mongodb 4.2.0 4.2.14