CVE-2021-45456

Name: CVE-2021-45456
Creator: NVD / NIST
Published: 2022-01-06T13:15:08.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 88.61%

Last modified Jun 17, 2026

CVE-2021-45456 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Apache kylin checks the legitimacy of the project before executing some commands with the project name passed in by the user. There is a mismatch between what is being checked and what is being used as the shell command argument in DiagnosisService. EPSS estimates a 88.61% chance of exploitation in the next 30 days.

Description

Apache kylin checks the legitimacy of the project before executing some commands with the project name passed in by the user. There is a mismatch between what is being checked and what is being used as the shell command argument in DiagnosisService. This may cause an illegal project name to pass the check and perform the following steps, resulting in a command injection vulnerability. This issue affects Apache Kylin 4.0.0.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

88.61%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-77

Affected Software

Vendor	Product	Versions
Apache	Kylin	4.0.0

References

http://www.openwall.com/lists/oss-security/2022/01/06/1Mailing List, Third Party Advisory
https://lists.apache.org/thread/70fkf9w1swt2cqdcz13rwfjvblw1fcpfMailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/01/06/1Mailing List, Third Party Advisory
https://lists.apache.org/thread/70fkf9w1swt2cqdcz13rwfjvblw1fcpfMailing List, Vendor Advisory

Timeline

Published: Jan 6, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45456?

How severe is CVE-2021-45456?

CVE-2021-45456 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 88.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45456?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45456?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST