CVE-2023-23933: Issue in Anomaly Detection with document and field level rules in numerical feature aggregations

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-02-03 · updated 2026-06-17
Weakness: CWE-125

Description

OpenSearch Anomaly Detection identifies atypical data and receives automatic notifications. There is an issue with the application of document and field level restrictions in the Anomaly Detection plugin, where users with the Anomaly Detector role can read aggregated numerical data (e.g. averages, sums) of fields that are otherwise restricted to them. This issue only affects authenticated users who were previously granted read access to the indexes containing the restricted fields. This issue has been patched in versions 1.3.8 and 2.6.0. There are no known workarounds for this issue.

Affected products

AWS Opensearch: from 1.0.0 before 1.3.8; from 2.0.0 before 2.6.0 — fixed in 1.3.8, 2.6.0

How to fix

Upgrade to a fixed version: AWS Opensearch 1.3.8, 2.6.0. Check the vendor advisory for mitigations.

References

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