cve 2025 37731

About this tag
CVE-2025-37731 is a medium-severity improper authentication vulnerability in Elasticsearch's PKI realm, identified as ESA-2025-27. It allows user impersonation when specially crafted client certificates are accepted by the server. Elasticsearch maintainers released fixes in versions 8.19.8, 9.1.8, and 9.2.2. The vulnerability has a CVSS v3.1 score of 6.8. This tag covers discussions about the CVE, its impact on Elasticsearch deployments, and the necessary updates to mitigate the impersonation risk.

  1. Elasticsearch PKI Realm Impersonation Fix CVE-2025-37731 (ESA-2025-27)

    Elasticsearch maintainers released a security update (ESA‑2025‑27) on December 15, 2025 that fixes CVE‑2025‑37731 — an Improper Authentication bug in Elasticsearch’s PKI realm that can allow user impersonation when specially crafted client certificates are presented and accepted by the server...
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