CVE-2026-9809: Mautic stored XSS in Projects component project tags

CVE-2026-9809 · Severity: high · CVSS 7.6 · Published 2026-05-29

Mautic, an open-source marketing automation platform, contains a security flaw in its Projects component. An attacker with basic user permissions can create a project with a malicious name that, when viewed by an administrator, allows the attacker to hijack the administrator's session. This could lead to unauthorized changes to marketing campaigns, system configuration tampering, or the theft of sensitive customer data.

Technologies: Mautic, Mautic Core, mautic/core (Packagist). Vendors: Mautic, Packagist.

Quick answers

Is CVE-2026-9809 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-9809 being exploited in the wild.
How severe is CVE-2026-9809?
High severity, with a CVSS score of 7.6, published 29 May 2026.
Which products and versions are affected?
Mautic >=7.0.0, <7.1.2; Mautic Core >= 7.0.0, < 7.1.2; mautic/core (Packagist) ECOSYSTEM:introduced=7.0.0,fixed=7.1.2.
Is there a fix for CVE-2026-9809?
Yes. mautic/core (Packagist): upgrade to 7.1.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-9809 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9809?
Check whether you run Mautic, Mautic Core or mautic/core (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • mautic/core (Packagist): upgrade to 7.1.2 or later
    composer require mautic/core:^7.1.2

Technical details

A stored Cross-Site Scripting (XSS) vulnerability exists in the Projects component of Mautic 7 (specifically mautic/core). The root cause is the failure to sanitize user-supplied project names before rendering them in project tags and popovers within administrative detail views, such as campaigns, emails, or forms. An authenticated attacker with low privileges (permission to create or edit projects) can inject a malicious script payload. When an administrator hovers over the compromised project tag, the script executes in their session context, potentially leading to administrative action impersonation or data exfiltration. The issue is fixed in version 7.1.2.

Affected products

  • Mautic Mautic Core >= 7.0.0, < 7.1.2

Identifiers

  • CVE-2026-9809
  • GHSA-7h65-whp7-rgqf

Timeline

  • 2026-05-29: disclosed: Initial disclosure via NVD
  • 2026-07-02: advisory: GitHub Advisory published
  • 2026-07-02: patched: Version 7.1.2 released

References

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