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MEDIUM severity

OpenSearch unauthorized data access on fields protected by field level security if field is a member of an objectGHSA-2rjv-cv85-xhgm

MEDIUM

GHSA-2rjv-cv85-xhgm is a medium-severity (CVSS 5.7) vulnerability in org.opensearch.plugin:opensearch-security. A fix is available for org.opensearch.plugin:opensearch-security — see the affected versions and patch details below.

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Aug 1, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
☕org.opensearch.plugin:opensearch-security

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Impact

OpenSearch versions 2.19.2 and earlier improperly apply Field Level Security (FLS) rules on fields which are not at the top level of the source document tree (i.e., which are members of a JSON object).

If an FLS exclusion rule (like ~object) is applied to an object valued attribute in a source document, the object is properly removed from the _source document in search and get results. However, any member attribute of that object remains available to search queries. This allows to reconstruct the original field contents using range queries.

Patches

The issue has been resolved in OpenSearch 3.0.0 and OpenSearch 2.19.3.

Workarounds

If FLS exclusion rules are used for object valued attributes (like ~object), add an additional exclusion rule for the members of the object (like ~object.*).

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.opensearch.plugin:opensearch-securityall versions2.19.3.0org.opensearch.plugin:opensearch-security:2.19.3.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.opensearch.plugin:opensearch-security, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.opensearch.plugin:opensearch-security to 2.19.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2rjv-cv85-xhgm is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Impact OpenSearch versions 2.19.2 and earlier improperly apply Field Level Security (FLS) rules on fields which are not at the top level of the source document tree (i.e., which are members of a JSON object). If an FLS exclusion rule (like `~object`) is applied to an object valued attribute in a source document, the object is properly removed from the `_source` document in search and get results. However, any member attribute of that object remains available to search queries. This allows to reconstruct the original field contents using range queries. ### Patches The issue has been r
O3 Security · Impact-Aware SCA

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OpenSearch unauthorized data access on fields protected…