CASCACascade Atlas

Evidence dossier

CVE-2020-1956

CVE-2020-1956

81.7–97.2Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
May 22, 2020
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS97.34%

2026-07-18 · v2026.06.15 · percentile 99.9%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

apacheoriginal assertion
container

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-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

CISA KEVoriginal assertion
observed_exploitation

Apache Kylin OS Command Injection Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.973370000000; percentile 0.998890000000

Applicability

Cited product scope

Trace impact →
ApacheKylin
[{"status": "affected", "version": "2.3.0"}, {"status": "affected", "version": "<=2.6.5"}, {"status": "affected", "version": "<=3.0.1"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*; start including 2.3.0; end including 2.3.2supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*; start including 2.5.0; end including 2.5.2supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*; start including 2.6.0; end including 2.6.5supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:2.4.0:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:2.4.1:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:3.0.0:-:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:3.0.0:alpha:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:3.0.0:alpha2:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:3.0.0:beta:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:apache:kylin:3.0.1:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

8.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0
nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.