Mautic vulnerable to reflected XSS in lead:addLeadTags - Quick Add
Summary
A Cross-Site Scripting (XSS) vulnerability allows an attacker to execute arbitrary JavaScript in the context of another user’s session. This occurs because user-supplied input is reflected back in the server’s response without proper sanitization or escaping, potentially enabling malicious actions such as session hijacking, credential theft, or unauthorized actions in the application.
Details
The vulnerability resides in the “Tags” input field on the /s/ajax?action=lead:addLeadTags endpoint. Although the server applies sanitization before storing the data or returning it later, the payload is executed immediately in the victim’s browser upon reflection, allowing an attacker to run arbitrary JavaScript in the user’s session.
Impact
A Reflected XSS attack can have a significant impact, allowing attackers to steal sensitive user data like cookies, redirect users to malicious websites, manipulate the web page content, and essentially take control of a user's session within an application by executing malicious JavaScript code within the victim's browser, even if the server-side code is secure; essentially enabling them to perform actions as if they were the logged-in user.
References
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | mautic/core | >= 4.4.0, < 4.4.17, >= 5.0.0-alpha, < 5.2.8, >= 6.0.0-alpha, < 6.0.5 | 4.4.17, 5.2.8, 6.0.5 |
Referencias
- Vector CVSS
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N- Debilidad (CWE)
CWE-79- Plataforma
- Composer
- Paquete
mautic/core- Publicada
- 03.09.2025
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-9v8p-m85m-f7mm - CC BY 4.0
Historial de vulnerabilidades: mautic/core
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 57
- Primera → última
- 01.2021 07.2026
- Sin corrección
- 1
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 9
- Alta 17
- Media 29
- Baja 2
Divulgaciones por año
- 2021: 16
- 2022: 7
- 2023: 0
- 2024: 13
- 2025: 13
- 2026: 8
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Mautic vulnerable to reflected XSS in lead:addLeadTags - Quick Add esta entrada
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