CVE-2020-1956
HighExploitedPublic exploitCommand Injection in Kylin
Published Jul 27, 2020 · Updated Jul 8, 2026 · Also known as GHSA-gprm-xqrc-c2j3
Key Facts
Patch immediately- CVE-2020-1956 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Kylin (Apache), org.apache.kylin:kylin-core-common (maven).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 14, 2020. Public exploit code is available.
- EPSS estimates a 97% probability of exploitation in the next 30 days.
- Fixed versions are available, including Kylin <=2.3.2, org.apache.kylin:kylin-core-common 2.6.6, org.apache.kylin:kylin-core-common 3.0.2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
97%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2020-1956 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 25, 2022 | Apr 15, 2022 | Not reported |
| Industry KEV feed | Oct 14, 2020 | Apr 15, 2022 | Not reported |
| CIRCL KEV | Mar 25, 2022 | Apr 15, 2022 | Not reported |
| ENISA EUVD | Mar 25, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
10 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| KylinApache | 2.4.0, 2.4.1, 3.0.0, 3.0.0-alpha, 3.0.0-alpha2, 3.0.0-beta, 3.0.1, >= 2.3.0 | 2.3.2 |
| org.apache.kylin:kylin-core-commonmaven | See advisory | 3.0.2 |
Patched Releases
Kylin
<=2.3.2
org.apache.kylin:kylin-core-common
2.6.6, 3.0.2
Timeline
Publicly disclosed
Jul 27, 2020
Added to Industry KEV feed
Oct 14, 2020
Added to CISA KEV
Mar 25, 2022
Added to CIRCL KEV
Mar 25, 2022
Added to ENISA EUVD
Mar 25, 2022
Last updated
Jul 8, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryGHSA advisory
- advisoryhttps://lists.apache.org/thread.html/r1332ef34cf8e2c0589cf44ad269fb1fb4c06addec6297f0320f5111d%40%3Cuser.kylin.apache.org%3E
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2020-1956
- advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1956
- patch[kylin-commits] 20200715 svn commit: r1879879 - in /kylin/site: docs/security.html feed.xml
FAQ
Common Questions.
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.
Affected: Kylin (Apache) versions 2.4.0, 2.4.1, 3.0.0, 3.0.0-alpha, 3.0.0-alpha2, 3.0.0-beta, 3.0.1, >= 2.3.0; org.apache.kylin:kylin-core-common (maven). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 14, 2020.
Yes. It was added on Mar 25, 2022 with a federal remediation due date of Apr 15, 2022.
Public exploit code is available.
Fixed versions are available, including Kylin <=2.3.2, org.apache.kylin:kylin-core-common 2.6.6, org.apache.kylin:kylin-core-common 3.0.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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