CVE-2021-22139

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-05-13 · updated 2026-06-17
Weakness: CWE-400

Description

Kibana versions before 7.12.1 contain a denial of service vulnerability was found in the webhook actions due to a lack of timeout or a limit on the request size. An attacker with permissions to create webhook actions could drain the Kibana host connection pool, making Kibana unavailable for all other users.

Affected products

Kibana: before 7.12.1 — fixed in 7.12.1

How to fix

Upgrade to a fixed version: Kibana 7.12.1. Check the vendor advisory for mitigations.

References

https://discuss.elastic.co/t/7-12-1-security-update/271433
https://discuss.elastic.co/t/7-12-1-security-update/271433

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