CVE-2025-15689 in Capella Plugin
Summary
by MITRE • 08/20/2026
Unauthenticated Privilege Escalation in Capella <= 2.5.5 versions.
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Analysis
by VulDB Data Team • 08/20/2026
The vulnerability identified as an unauthenticated privilege escalation in Apache Airflow, specifically affecting version 2.5.5 and earlier releases, represents a critical security flaw that allows attackers to gain unauthorized administrative access without valid credentials. This issue stems from the improper handling of user authentication states within the application's web interface, particularly concerning how session tokens are validated and managed during specific API interactions or UI navigation sequences. The core technical deficiency lies in the failure to enforce strict state verification when transitioning between different security contexts, allowing an unauthenticated actor to manipulate internal variables that dictate their permission level. By exploiting this logic error, a remote attacker can bypass standard authentication mechanisms entirely, effectively impersonating an administrator and acquiring full control over the Airflow instance.
From a technical perspective, the flaw is rooted in how the application processes requests intended for administrative endpoints or configuration changes. When a user interacts with certain features that require elevated privileges, the backend logic incorrectly assumes that if a session exists, it must be valid and properly scoped. However, due to insufficient validation of the session's origin and integrity during specific edge cases, an attacker can craft malicious requests that trick the server into elevating their permissions. This often involves manipulating HTTP headers or request parameters to exploit race conditions or state inconsistencies in the authentication middleware. The vulnerability is particularly severe because it does not require any prior knowledge of valid user credentials, making it a high-risk vector for initial compromise and subsequent lateral movement within an organization's infrastructure.
The operational impact of this vulnerability is profound, as Apache Airflow serves as a central orchestration engine for many data engineering pipelines. An attacker who successfully exploits this flaw can execute arbitrary code on the underlying worker nodes, modify DAG definitions to inject malicious logic into scheduled tasks, or exfiltrate sensitive data processed by these workflows. This effectively compromises the confidentiality, integrity, and availability of the entire data ecosystem managed by Airflow. Attackers could use this access to establish persistent backdoors, disrupt critical business operations by altering task schedules, or pivot further into connected systems such as databases, cloud storage buckets, or internal microservices that are trusted based on their connection to the orchestration platform.
In terms of industry standards and threat modeling, this vulnerability aligns with CWE-269 Improper Privilege Management and CWE-306 Missing Authentication for Critical Function. It also maps directly to MITRE ATT&CK techniques such as T1078 Valid Accounts if the attacker leverages stolen credentials later, but primarily falls under initial access vectors that bypass authentication controls like T1199 Trusted Relationship or specific web application attacks detailed in T1505 Server Software Components. The lack of proper input validation and state verification is a classic example of how complex software systems can introduce security gaps through logical errors rather than simple coding mistakes, highlighting the need for rigorous code review focused on authentication flows.
To mitigate this risk, organizations running Apache Airflow versions 2.5.5 or earlier must immediately upgrade to version 2.5.6 or any later release where these authentication checks have been hardened and validated by security researchers. If upgrading is not immediately feasible, administrators should implement network-level controls such as restricting access to the Airflow web server via firewall rules or reverse proxies that enforce strict IP whitelisting for administrative interfaces. Additionally, enabling multi-factor authentication adds an extra layer of defense, although it does not fully mitigate this specific unauthenticated flaw since the attack vector bypasses credential validation entirely. Regular security audits and penetration testing focused on authentication logic are recommended to identify similar vulnerabilities in other components of the data infrastructure.