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Description

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. When another administrative user subsequently opens an entity editor containing the project selector, the injected script executes within the context of their active browser session. This could allow an attacker to hijack the session, perform unauthorized state coordination, or access organizational data within the dashboard.

PUBLISHED Reserved 2026-05-28 | Published 2026-05-29 | Updated 2026-05-29 | Assigner Mautic




MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

7.0.0 (semver) before 7.1.2
affected

Credits

@pavelkohout396 finder

John Linhart (@escopecz) remediation developer

Patryk Gruszka (@patrykgruszka) remediation reviewer

Leuchtfeuer Digital Marketing (@Leuchtfeuer) sponsor

References

github.com/...mautic/security/advisories/GHSA-5hvg-w58j-545m

cve.org (CVE-2026-9811)

nvd.nist.gov (CVE-2026-9811)

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