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CVE-2020-13927

CRITICAL
Published 2020-11-10T00:00:00.000Z
Actions:

Expert Analysis

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CVSS Score

V3.1
9.8
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.942
probability
of exploitation in the wild

There is a 94.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.999
Higher than 99.9% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

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

Available Exploits

Airflow Experimental <1.10.11 - REST API Auth Bypass

Airflow's Experimental API prior 1.10.11 allows all API requests without authentication.

ID: CVE-2020-13927
Author: pdteam Critical

References:

Related News

No news articles found for this CVE.

Affected Products

apache

airflow

Affected Versions:

0

Known Exploited Vulnerability

This vulnerability is actively being exploited in the wild

View KEV Details

Remediation Status

Overdue

Due Date

July 18, 2022

Added to KEV

January 18, 2022

Required Action

Apply updates per vendor instructions.

Affected Product

Vendor/Project: Apache
Product: Airflow's Experimental API

Ransomware Risk

Known Ransomware Use
KEV Catalog Version: 2025.01.24 Released: January 24, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed CRITICAL

Authentication bypass in Apache Airflow

GHSA-hhx9-p69v-cx2j

Advisory Details

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

Affected Packages

PyPI apache-airflow
ECOSYSTEM: ≥0 <1.10.11

CVSS Scoring

CVSS Score

9.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-13927
WEB https://github.com/apache/airflow/pull/9611
WEB https://github.com/apache/airflow/commit/180bca4f993b7b778a8d2c65d3d357652218922b
WEB https://github.com/apache/airflow/commit/9e305d6b810a2a21e2591a80a80ec41acb3afed0
WEB https://airflow.apache.org/docs/apache-airflow/1.10.11/security.html#api-authentication
ADVISORY https://github.com/advisories/GHSA-hhx9-p69v-cx2j
PACKAGE https://github.com/apache/airflow
WEB https://github.com/apache/airflow/releases/tag/1.10.11
WEB https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2020-18.yaml
WEB https://lists.apache.org/thread.html/r23a81b247aa346ff193670be565b2b8ea4b17ddbc7a35fc099c1aadd%40%3Cdev.airflow.apache.org%3E
WEB http://packetstormsecurity.com/files/162908/Apache-Airflow-1.10.10-Remote-Code-Execution.html
WEB http://packetstormsecurity.com/files/174764/Apache-Airflow-1.10.10-Remote-Code-Execution.html

Advisory provided by GitHub Security Advisory Database. Published: April 30, 2021, Modified: September 11, 2024

References

https://lists.apache.org/thread.html/r23a81b247aa346ff193670be565b2b8ea4b17ddbc7a35fc099c1aadd%40%3Cdev.airflow.apache.org%3E
http://packetstormsecurity.com/files/162908/Apache-Airflow-1.10.10-Remote-Code-Execution.html
http://packetstormsecurity.com/files/174764/Apache-Airflow-1.10.10-Remote-Code-Execution.html
Published: 2020-11-10T00:00:00.000Z
Last Modified: 2025-07-28T19:48:05.949Z
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