CVE-2021-28359: 
Apache Airflow vulnerability analysis and mitigation

CVE-2021-28359 is a reflected Cross-Site Scripting (XSS) vulnerability in Apache Airflow that affects versions <1.10.15 in the 1.x series, and versions 2.0.0 and 2.0.1 in the 2.x series. The vulnerability exists in the 'origin' parameter passed to certain endpoints like '/trigger'. This is a continuation of previously identified vulnerabilities (CVE-2020-13944 & CVE-2020-17515) where the implemented fixes did not completely address all cases (Openwall).

The vulnerability is a reflected XSS issue that specifically affects the 'origin' parameter in certain endpoints of Apache Airflow, such as '/trigger'. This vulnerability persisted despite previous fixes for similar issues, indicating that the original remediation was incomplete. The issue was discovered by security researcher Vasileios Daskalakis (Openwall, FortiGuard).

When successfully exploited, this vulnerability could allow attackers to execute malicious cross-site scripting attacks through the affected endpoints. This could potentially lead to unauthorized access to user data, session hijacking, or other client-side attacks (FortiGuard).

Users are advised to upgrade to Apache Airflow version 1.10.15 or 2.0.2, depending on their current version series. Additionally, it is recommended to update Python installations to the latest available PATCH releases of installed MINOR versions (e.g., update to Python 3.6.13 if running Python 3.6.10) to address related vulnerabilities (Openwall).