CVE-2025-9823: Mautic vulnerable to reflected XSS in lead:addLeadTags - Quick Add

CVE-2025-9823 · Severity: medium · CVSS 4 · Published 2025-09-03

Mautic vulnerable to reflected XSS in lead:addLeadTags - Quick Add

Technologies: mautic/core (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2025-9823 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-9823 being exploited in the wild.
How severe is CVE-2025-9823?
Medium severity, with a CVSS score of 4, published 3 September 2025.
Which products and versions are affected?
mautic/core (Packagist) ECOSYSTEM:introduced=4.4.0,fixed=4.4.17.
Is there a fix for CVE-2025-9823?
Yes. mautic/core (Packagist): upgrade to 4.4.17 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-9823?
Check whether you run 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 4.4.17 or later
    composer require mautic/core:^4.4.17

Affected products

  • mautic/core (Packagist) ECOSYSTEM:introduced=4.4.0,fixed=4.4.17

Identifiers

  • CVE-2025-9823
  • GHSA-9v8p-m85m-f7mm

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