Mautic has Stored Cross-Site Scripting (XSS) in Project Option Selector

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

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

EPSS

• CVE-2026-9811: 0.17% estimated exploitation activity in the next 30 days; percentile 6.75 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary 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. Impact 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. Patched Versions This security issue has been addressed in the following release: 7.1.2 Note: Mautic 6.x, 5.x, and 4.x branches do not contain the Projects feature or the associated AJAX selector and are not affected by…

Published by the source

2 Jul 2026, 19:49 UTC

Last modified by the source

2 Jul 2026, 19:49 UTC

Source last checked

26 Oct 2026, 14:49 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-5hvg-w58j-545m

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# Patch Next advisory brief: CVE-2026-9811

Advisory: Mautic has Stored Cross-Site Scripting (XSS) in Project Option Selector
IDs: CVE-2026-9811, GHSA-5hvg-w58j-545m
Record: https://patchnext.com/advisories/cve-2026-9811 (revision 1, source checked 26 Oct 2026, 14:49 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: mautic/core 7.1.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist mautic/core: affected >= 7.0.0, < 7.1.2; fixed in 7.1.2

## Suggested inspection (read-only)
- Packagist mautic/core: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on mautic/core.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-5hvg-w58j-545m (GitHub-reviewed advisory GHSA-5hvg-w58j-545m lists affected ranges: Packagist mautic/core >=7.0.0 <7.1.2)

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