Cross Site Scripting in markdown interpreter

Vulnerability

A Cross-Site Scripting (XSS) vulnerability exists in the markdown interpreter of Apache Zeppelin, a web-based notebook for interactive data analytics. The flaw allows an attacker to inject arbitrary malicious scripts via crafted markdown content. This issue affects all Apache Zeppelin versions prior to 0.9.0 [1][2].

Exploitation

An attacker can exploit this vulnerability by crafting a markdown note containing malicious JavaScript and then convincing a victim to view that note. No authentication is required if the attacker can create or modify notes in a shared Zeppelin environment. The script executes in the context of the victim's browser session when the markdown is rendered [2].

Impact

Successful exploitation enables the attacker to execute arbitrary JavaScript in the victim's browser, potentially leading to session hijacking, data theft, defacement, or other malicious actions within the Zeppelin application's security context [1][2].

Mitigation

Apache Zeppelin released version 0.9.0 which fixes this vulnerability. Users should upgrade to 0.9.0 or later. The Gentoo security advisory (GLSA 202311-04) recommends upgrading to 0.10.1 for users of that distribution [4]. No known workarounds exist for unpatched versions [2].