Is CVE-2020-13927 in the CISA KEV catalog?

Yes. CVE-2020-13927 is on the CISA Known Exploited Vulnerabilities list, added 2022-01-18.

What is the CVSS severity of CVE-2020-13927?

CVE-2020-13927 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2020-13927?

CVE-2020-13927 has an EPSS score of 99.67% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-13927?

Upgrade airflow to 1.10.11 or later.

CVE & CISA-KEV Catalog

CVE-2020-13927

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

The previous default setting for Airflow's Experimental API was to allow all API requests without authentication, but this poses security risks to users who miss this fact. From Airflow 1.10.11 the default has been changed to deny all requests by default and is documented at https://airflow.apache.org/docs/1.10.11/security.html#api-authentication. Note this change fixes it for new installs but existing users need to change their config to default `[api]auth_backend = airflow.api.auth.backend.deny_all` as mentioned in the Updating Guide: https://github.com/apache/airflow/blob/1.10.11/UPDATING.md#experimental-api-will-deny-all-request-by-default

CWE-306Missing Authentication for Critical Function CWE-1188 CWE-1056

How to fix

Remediation Available

airflowNVD

Affected:< 1.10.11Fixed in:1.10.11CVE-2020-13927derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

99.67%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Apache Airflow's Experimental API Authentication Bypass

The previous default setting for Airflow's Experimental API was to allow all API requests without authentication.

Apply updates per vendor instructions.

Remediation due: 2022-07-18

References

Exploit2

Vendor Advisory1

lists.apache.org

Third-Party Advisory1

cisa.gov

Related Vulnerabilities

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-10271	High	7.5	100%	KEV + Ransom	-
CVE-2025-3248	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-1388	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-37415	Critical	9.8	100%	KEV	-
CVE-2023-21839	High	7.5	100%	KEV	-

Embed a live status badge for CVE-2020-13927

Markdown

[![CVE-2020-13927](https://tridentstack.com/cve/badge/CVE-2020-13927.svg)](https://tridentstack.com/cve/CVE-2020-13927)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-13927"><img src="https://tridentstack.com/cve/badge/CVE-2020-13927.svg" alt="CVE-2020-13927"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-23.