CVE-2021-27738

Name: CVE-2021-27738
Creator: NVD / NIST
Published: 2022-01-06T13:15:07.967+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.56%

Last modified Jun 17, 2026

CVE-2021-27738 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. All request mappings in `StreamingCoordinatorController.java` handling `/kylin/api/streaming_coordinator/*` REST API endpoints did not include any security checks, which allowed an unauthenticated user to issue arbitrary requests, such as assigning/unassigning of streaming cubes, creation/modification and deletion of replica sets, to the Kylin Coordinator. For endpoints accepting node details in HTTP message body, unauthenticated (but limited) server-side request forgery (SSRF) can be achieved. EPSS estimates a 2.56% chance of exploitation in the next 30 days.

Description

All request mappings in `StreamingCoordinatorController.java` handling `/kylin/api/streaming_coordinator/*` REST API endpoints did not include any security checks, which allowed an unauthenticated user to issue arbitrary requests, such as assigning/unassigning of streaming cubes, creation/modification and deletion of replica sets, to the Kylin Coordinator. For endpoints accepting node details in HTTP message body, unauthenticated (but limited) server-side request forgery (SSRF) can be achieved. This issue affects Apache Kylin Apache Kylin 3 versions prior to 3.1.2.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.56%

83.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Kylin	>= 3.0.0, < 3.1.2

References

http://www.openwall.com/lists/oss-security/2022/01/06/6Mailing List, Third Party Advisory
https://lists.apache.org/thread/vkohh0to2vzwymyb2x13fszs3cs3vd70Mailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/01/06/6Mailing List, Third Party Advisory
https://lists.apache.org/thread/vkohh0to2vzwymyb2x13fszs3cs3vd70Mailing List, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-27738?

How severe is CVE-2021-27738?

CVE-2021-27738 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.56% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27738?

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-2021-27738?

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

Scan your code now

Source: NVD / NIST