Improper Check for Unusual or Exceptional Conditions Affecting mongodb package, versions [4.0.0, 4.0.27)[4.2.0, 4.2.16)[4.4.0, 4.4.9)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-MONGODB-14606785
- published25 Dec 2025
- disclosed24 Dec 2025
- creditUnknown
Introduced: 24 Dec 2025
CVE-2021-20330 (opens in a new tab)How to fix?
Upgrade mongodb to version 4.0.27, 4.2.16, 4.4.9 or higher.
Overview
Affected versions of this package are vulnerable to Improper Check for Unusual or Exceptional Conditions via of oplog entries processed by the applyOps command. An attacker with basic CRUD permissions on a replicated collection can submit specially malformed oplog entries, causing secondary nodes to encounter invalid states during replication.