CVE-2026-3107

Estado: AnalizadaCrítica (9.3)—

Stored Cross-Site Scripting (XSS) in Teampass versions prior to 3.1.5.16, affecting the password manager's password import functionality at the endpoint 'redacted/index.php?page=items'. The application fails to properly sanitize and encode user-input data during the import process, allowing malicious JavaScript payloads to be persistently stored in the database. When other users view the imported passwords, the payload is automatically executed in their browsers, resulting in a stored XSS condition at the endpoint 'redacted/index.php?page=items'.

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Exploiting this vulnerability allows an attacker to execute arbitrary JavaScript code in the context of multiple users and the administrator, which can lead to session hijacking, credential theft, privilege abuse, and compromise of application integrity.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 9.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.23%
Percentil entre todas las CVEs puntuadas: 13
Fecha de la puntuación: 5/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access60 %
Impacto principalT1059.007 JavaScriptexecution55 %

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability Scanning Restrict Web-Based Content Privileged Account Management Network Segmentation Limit Access to Resource Over Network Filter Network Traffic

Tecnologías afectadas (1)

Teampass — Teampass

CWE

CWE-79

Referencias

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-teampass

JSON original (NVD)

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      "value": "Stored Cross-Site Scripting (XSS) in Teampass versions prior to 3.1.5.16, affecting the password manager's password import functionality at the endpoint 'redacted/index.php?page=items'. The application fails to properly sanitize and encode user-input data during the import process, allowing malicious JavaScript payloads to be persistently stored in the database. When other users view the imported passwords, the payload is automatically executed in their browsers, resulting in a stored XSS condition at the endpoint 'redacted/index.php?page=items'. Exploiting this vulnerability allows an attacker to execute arbitrary JavaScript code in the context of multiple users and the administrator, which can lead to session hijacking, credential theft, privilege abuse, and compromise of application integrity."
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      "value": "Cross-site scripting (XSS) almacenado en versiones de Teampass anteriores a la 3.1.5.16, que afecta la funcionalidad de importación de contraseñas del gestor de contraseñas en el endpoint 'redacted/index.php?page=items'. La aplicación no logra sanear y codificar correctamente los datos de entrada del usuario durante el proceso de importación, permitiendo que cargas útiles maliciosas de JavaScript se almacenen persistentemente en la base de datos. Cuando otros usuarios ven las contraseñas importadas, la carga útil se ejecuta automáticamente en sus navegadores, lo que resulta en una condición de XSS almacenado en el endpoint 'redacted/index.php?page=items'. Explotar esta vulnerabilidad permite a un atacante ejecutar código JavaScript arbitrario en el contexto de múltiples usuarios y el administrador, lo que puede llevar al secuestro de sesión, robo de credenciales, abuso de privilegios y compromiso de la integridad de la aplicación."
    }
  ],
  "lastModified": "2026-06-17T10:43:03.370",
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