CVE-2020-1956
CVE-2020-1956 is a high-severity vulnerability in Apache Kylin with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-25). The underlying weakness is classified as CWE-78.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 9.0
- EPSS exploit prediction: 97% (100th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2022-03-25)
- EU (EUVD) id: EUVD-2020-0557
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-25)
- Weakness: CWE-78
- Affected product: Apache Kylin
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2020-1956?
- 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.
- How severe is CVE-2020-1956?
- CVE-2020-1956 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-1956 being actively exploited?
- Yes. CVE-2020-1956 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2020-1956?
- CVE-2020-1956 primarily affects Apache Kylin. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2020-1956?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2020-1956 have an EU (EUVD) identifier?
- Yes. CVE-2020-1956 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-0557. It is also flagged as exploited in the EUVD (since 2022-03-25).
- When was CVE-2020-1956 published?
- CVE-2020-1956 was published on 2020-05-22 and last updated on 2026-06-17.
References
- http://www.openwall.com/lists/oss-security/2020/07/14/1
- https://community.sonarsource.com/t/apache-kylin-3-0-1-command-injection-vulnerability/25706
- https://lists.apache.org/thread.html/r021baf9d8d4ae41e8c8332c167c4fa96c91b5086563d9be55d2d7acf%40%3Ccommits.kylin.apache.org%3E
- https://lists.apache.org/thread.html/r1332ef34cf8e2c0589cf44ad269fb1fb4c06addec6297f0320f5111d%40%3Cuser.kylin.apache.org%3E
- https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cdev.kylin.apache.org%3E
- https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cuser.kylin.apache.org%3E
- https://lists.apache.org/thread.html/r61666760d8a4e8764b2d5fe158d8a48b569414480fbfadede574cdc0%40%3Ccommits.kylin.apache.org%3E
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1956
Affected products (8)
- cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*
- cpe:2.3:a:apache:kylin:2.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:apache:kylin:2.4.1:*:*:*:*:*:*:*
- cpe:2.3:a:apache:kylin:3.0.0:-:*:*:*:*:*:*
- cpe:2.3:a:apache:kylin:3.0.0:alpha:*:*:*:*:*:*
- cpe:2.3:a:apache:kylin:3.0.0:alpha2:*:*:*:*:*:*
- cpe:2.3:a:apache:kylin:3.0.0:beta:*:*:*:*:*:*
- cpe:2.3:a:apache:kylin:3.0.1:*:*:*:*:*:*:*
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