CVE-2020-1956

Name: CVE-2020-1956
Creator: NVD / NIST
Published: 2020-05-22T14:15:11.84+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10Actively ExploitedEPSS 97.96%

Last modified Jun 17, 2026

CVE-2020-1956 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Apache Kylin 2.3.0, and releases up to 2.6.5 and 3.0.1 has some restful apis which will concatenate os command with the user input string, a user is likely to be able to execute any os command without any protection or validation.. CISA has confirmed active exploitation in the wild. EPSS estimates a 97.96% chance of exploitation in the next 30 days.

Description

Apache Kylin 2.3.0, and releases up to 2.6.5 and 3.0.1 has some restful apis which will concatenate os command with the user input string, a user is likely to be able to execute any os command without any protection or validation.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

97.96%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 15, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Kylin	>= 2.3.0, <= 2.3.2
Apache	Kylin	>= 2.5.0, <= 2.5.2
Apache	Kylin	>= 2.6.0, <= 2.6.5
Apache	Kylin	2.4.0
Apache	Kylin	2.4.1
Apache	Kylin	3.0.0
Apache	Kylin	3.0.1

References

http://www.openwall.com/lists/oss-security/2020/07/14/1Mailing List
https://community.sonarsource.com/t/apache-kylin-3-0-1-command-injection-vulnerability/25706Exploit, Third Party Advisory
https://lists.apache.org/thread.html/r021baf9d8d4ae41e8c8332c167c4fa96c91b5086563d9be55d2d7acf%40%3Ccommits.kylin.apache.org%3EMailing List, Patch
https://lists.apache.org/thread.html/r1332ef34cf8e2c0589cf44ad269fb1fb4c06addec6297f0320f5111d%40%3Cuser.kylin.apache.org%3EMailing List, Mitigation, Vendor Advisory
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cannounce.apache.org%3EMailing List
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cdev.kylin.apache.org%3EMailing List
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cuser.kylin.apache.org%3EMailing List
https://lists.apache.org/thread.html/r61666760d8a4e8764b2d5fe158d8a48b569414480fbfadede574cdc0%40%3Ccommits.kylin.apache.org%3EMailing List, Patch
http://www.openwall.com/lists/oss-security/2020/07/14/1Mailing List
https://community.sonarsource.com/t/apache-kylin-3-0-1-command-injection-vulnerability/25706Exploit, Third Party Advisory
https://lists.apache.org/thread.html/r021baf9d8d4ae41e8c8332c167c4fa96c91b5086563d9be55d2d7acf%40%3Ccommits.kylin.apache.org%3EMailing List, Patch
https://lists.apache.org/thread.html/r1332ef34cf8e2c0589cf44ad269fb1fb4c06addec6297f0320f5111d%40%3Cuser.kylin.apache.org%3EMailing List, Mitigation, Vendor Advisory
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cannounce.apache.org%3EMailing List
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cdev.kylin.apache.org%3EMailing List
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cuser.kylin.apache.org%3EMailing List
https://lists.apache.org/thread.html/r61666760d8a4e8764b2d5fe158d8a48b569414480fbfadede574cdc0%40%3Ccommits.kylin.apache.org%3EMailing List, Patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1956Third Party Advisory, US Government Resource

Timeline

Published: May 22, 2020
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2020-1956?

How severe is CVE-2020-1956?

CVE-2020-1956 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 97.96% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2020-1956?

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-2020-1956?

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

Scan your code now

Source: NVD / NIST