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

Source: https://junglewise.ai/threats/cve-2025-9823-mautic-vulnerable-to-reflected-xss-in-lead-addleadtags-quick-add  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-09-03  
License: CC BY 4.0 with a link back

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)](https://junglewise.ai/threats/technologies/packagist-mautic-core). Vendors: [Packagist](https://junglewise.ai/threats/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

  ```sh
  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

## Related threats

- [Mautic stored XSS in project selector component](https://junglewise.ai/threats/cve-2026-9811-mautic-stored-xss-in-project-selector-component)
- [Mautic stored XSS in Projects component project tags](https://junglewise.ai/threats/cve-2026-9809-mautic-stored-xss-in-projects-component-project-tags)
- [Mautic Core authorization bypass in API v2 endpoints](https://junglewise.ai/threats/cve-2026-9808-mautic-core-authorization-bypass-in-api-v2-endpoints)
- [Mautic path traversal in campaign import feature](https://junglewise.ai/threats/cve-2026-9559-mautic-path-traversal-in-campaign-import-feature)
- [Mautic Server-Side Template Injection in theme engine](https://junglewise.ai/threats/cve-2026-9558-mautic-server-side-template-injection-in-theme-engine)