CVE-2021-45457: Overly broad CORS configuration

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-06 · updated 2026-06-17
Weakness: CWE-863

Description

In Apache Kylin, Cross-origin requests with credentials are allowed to be sent from any origin. This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions; Apache Kylin 4 version 4.0.0 and prior versions.

Affected products

Apache Software Foundation Apache Kylin: from 2.0.0 through 2.6.6; from 3.0.0 before 3.1.3; 4.0.0, 4.0.0-alpha, 4.0.0-beta — fixed in 3.1.3

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Kylin 3.1.3. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2022/01/06/2
https://lists.apache.org/thread/rzv4mq58okwj1n88lry82ol2wwm57q1m
http://www.openwall.com/lists/oss-security/2022/01/06/2
https://lists.apache.org/thread/rzv4mq58okwj1n88lry82ol2wwm57q1m

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