CVE-2026-9811

Vulnerability

A stored Cross-Site Scripting (XSS) vulnerability exists in the project selector component of Mautic 7. When rendering selection menus for associating projects with system entities, the application fails to sanitize project names returned via AJAX before injecting them into the DOM as option fields. An authenticated user with permissions to create projects can exploit this to store a malicious script payload in the project's name. Affected versions include Mautic 7 prior to 7.1.2; Mautic 6.x, 5.x, and 4.x are not affected as they lack the Projects feature [1].

Exploitation

An attacker must be an authenticated user with permissions to create projects. The attacker creates a project with a crafted script as its name. When another administrative user subsequently opens an entity editor that includes the project selector, the injected script executes within the context of their active browser session. No additional user interaction beyond opening the editor is required [1].

Impact

Upon successful exploitation, the attacker can hijack the victim's session, perform unauthorized state coordination, or access organizational data within the dashboard. The script runs in the context of the administrative user's session, potentially allowing further compromise [1].

Mitigation

The vulnerability is fixed in Mautic version 7.1.2 [1]. No official workarounds exist; as a mitigation, restrict project creation and modification permissions to trusted administrative users. Mautic 6.x, 5.x, and 4.x are not affected and do not require patching [1].