CVE-2020-1956

HIGHNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Trending — 3 sources updated this weekExploited in the wild
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 97%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
99.9%
KEV
⚠ Exploited

Published

May 22, 2020

Last Modified

October 23, 2025

Advisory Details (8)

Auto-updated Jun 2, 2026
No patch confirmed yet.
generic

[Tech Story] Apache Kylin 3.0.1 Command Injection Vulnerability - Sonar Updates - Sonar Community

https://community.sonarsource.com/t/apache-kylin-3-0-1-command-injection-vulnerability/25706
generic

oss-security - [SECURITY][CVE-2020-13925] Apache Kylin command injection vulnerability

http://www.openwall.com/lists/oss-security/2020/07/14/1
generic
https://lists.apache.org/thread.html/r61666760d8a4e8764b2d5fe158d8a48b569414480fbfadede574cdc0%40%3Ccommits.kylin.apache.org%3E
generic
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cuser.kylin.apache.org%3E
generic
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cdev.kylin.apache.org%3E
generic
https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cannounce.apache.org%3E
generic
https://lists.apache.org/thread.html/r1332ef34cf8e2c0589cf44ad269fb1fb4c06addec6297f0320f5111d%40%3Cuser.kylin.apache.org%3E
generic
https://lists.apache.org/thread.html/r021baf9d8d4ae41e8c8332c167c4fa96c91b5086563d9be55d2d7acf%40%3Ccommits.kylin.apache.org%3E

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.kylin:kylin-core-common3.0.0, 3.0.13.0.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 01:50 UTCEG score recompute
  2. 2026-07-23 00:07 UTCEG score recompute
  3. 2026-07-22 22:36 UTCEG score recompute
  4. 2026-07-22 19:40 UTCCISA KEV update
  5. 2026-07-22 16:10 UTCEG score recompute
  6. 2026-07-22 14:05 UTCEPSS rescore
  7. 2026-07-21 14:37 UTCCISA KEV update
  8. 2026-07-17 08:39 UTCEG score recompute
  9. 2026-07-16 17:04 UTCCISA KEV update
  10. 2026-07-15 16:49 UTCCISA KEV update
  11. 2026-07-15 15:04 UTCCISA KEV update
  12. 2026-07-14 18:05 UTCCISA KEV update
  13. 2026-07-13 22:27 UTCEPSS rescore
  14. 2026-07-13 22:27 UTCEPSS rescore
  15. 2026-07-13 17:07 UTCCISA KEV update
  16. 2026-07-10 17:52 UTCCISA KEV update
  17. 2026-07-08 15:12 UTCEPSS rescore
  18. 2026-07-07 19:01 UTCCISA KEV update
  19. 2026-07-07 17:16 UTCCISA KEV update
  20. 2026-07-01 19:16 UTCCISA KEV update
  21. 2026-06-29 19:12 UTCCISA KEV update
  22. 2026-06-25 19:15 UTCCISA KEV update
  23. 2026-06-24 14:03 UTCEPSS rescore
  24. 2026-06-24 14:03 UTCEPSS rescore
  25. 2026-06-23 21:31 UTCEPSS rescore
Show 38 more
  1. 2026-06-23 21:31 UTCEPSS rescore
  2. 2026-06-23 17:44 UTCCISA KEV update
  3. 2026-06-18 17:50 UTCEPSS rescore
  4. 2026-06-18 16:13 UTCCISA KEV update
  5. 2026-06-16 19:33 UTCCISA KEV update
  6. 2026-06-15 19:33 UTCCISA KEV update
  7. 2026-06-15 17:46 UTCEPSS rescore
  8. 2026-06-12 17:35 UTCCISA KEV update
  9. 2026-06-11 19:10 UTCCISA KEV update
  10. 2026-06-11 13:58 UTCEPSS rescore
  11. 2026-06-10 22:16 UTCEPSS rescore
  12. 2026-06-10 22:16 UTCEPSS rescore
  13. 2026-06-09 18:42 UTCCISA KEV update
  14. 2026-06-09 17:12 UTCCISA KEV update
  15. 2026-06-08 19:16 UTCCISA KEV update
  16. 2026-06-08 17:26 UTCCISA KEV update
  17. 2026-06-08 14:15 UTCEPSS rescore
  18. 2026-06-08 14:15 UTCEPSS rescore
  19. 2026-06-05 22:43 UTCCISA KEV update
  20. 2026-06-04 13:10 UTCEPSS rescore
  21. 2026-06-04 13:10 UTCEPSS rescore
  22. 2026-06-03 19:09 UTCCISA KEV update
  23. 2026-06-02 20:11 UTCEPSS rescore
  24. 2026-06-02 20:11 UTCEPSS rescore
  25. 2026-06-02 18:32 UTCCISA KEV update
  26. 2026-06-01 20:42 UTCCISA KEV update
  27. 2026-06-01 13:50 UTCEPSS rescore
  28. 2026-06-01 13:50 UTCEPSS rescore
  29. 2026-05-31 00:15 UTCEPSS rescore
  30. 2026-05-31 00:15 UTCEPSS rescore
  31. 2026-05-29 22:20 UTCCISA KEV update
  32. 2026-05-28 13:43 UTCEPSS rescore
  33. 2026-05-28 13:43 UTCEPSS rescore
  34. 2026-05-27 20:35 UTCCISA KEV update
  35. 2026-05-26 19:16 UTCEG score recompute
  36. 2026-05-26 19:13 UTCCISA KEV update
  37. 2026-05-26 07:17 UTCEPSS rescore
  38. 2026-05-26 07:17 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2020/CVE-2020-1956.yaml
    First seen Jan 1, 2020

    Apache Kylin 3.0.1 - Command Injection Vulnerability

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2020-1956?
CVE-2020-1956 is a high vulnerability published on May 22, 2020. 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.
When was CVE-2020-1956 disclosed?
CVE-2020-1956 was first published in the National Vulnerability Database on May 22, 2020, with the most recent update on October 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-1956 actively exploited?
Yes. CISA added CVE-2020-1956 to the Known Exploited Vulnerabilities catalog on March 25, 2022, affecting Apache Kylin. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-1956?
CVE-2020-1956 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2020-1956?
CVE-2020-1956 affects Apache Kylin. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-1956?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-1956, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-1956

Explore →

Is Your Infrastructure Affected by CVE-2020-1956?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs