Unauthorized access to fields protected by Field-Level Security (FLS) when those fields are members of an object
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
In Search Guard FLX versions 3.1.1 and earlier, Field-Level Security (FLS) rules are improperly enforced on object-valued fields. When an FLS exclusion rule (e.g., ~field) is applied to a field which contains an object as its value, the object is correctly removed from the _source returned by search operations. However, the object members (i.e., child attributes) remain accessible to search queries. This exposure allows adversaries to infer or reconstruct the original contents of the excluded object. Workaround - If you cannot upgrade immediately and FLS exclusion rules are used for object valued attributes (like ~object), add an additional exclusion rule for the members of the object (like ~object.*).
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-12147
- 2026-10-03 Alias added: GHSA-5pcq-rjhv-m338
References
More floragunn vulnerabilities
- TI-2019-10092 Improper authentication in floragunn Search Guard Kibana Plugin CVSS 3.1HIGH 8.8
- TI-2026-04202 Some management operations on data streams are not properly restricted when user does not have the necessary privileges CVSS 3.1HIGH 8.1
- TI-2019-10088 Search Guard versions before 23.1 had an issue that for aggregations clear text values of anonymised fields were leaked. CVSS 3.0HIGH 7.5
- TI-2019-10087 Search Guard versions before 24.0 had an issue that values of string arrays in documents are not properly anonymized. CVSS 3.1HIGH 7.5
- TI-2019-10085 Improper authorization in floragunn Search Guard CVSS 3.1MEDIUM 6.5
- TI-2019-10084 Search Guard versions before 24.3 had an issue when Cross Cluster Search (CCS) was… CVSS 3.1MEDIUM 6.5
Sources
- CVE-2025-12147 · CVE Program
- CVE-2025-12147 · NVD
- FIRST EPSS
- GHSA-5pcq-rjhv-m338 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences