XSS Filter Bypass via Encoded URL in validator
Versions of validator prior to 2.0.0 contained an xss filter method that is affected by several filter bypasses. This may result in a cross-site scripting vulnerability.
Proof of Concept
The xss() function removes the word "javascript" when contained inside an attribute.
However, it does not properly handle cases where characters have been hex-encoded.
As a result, it is possible to build an input that bypasses the filter but which the browser will accept as valid JavaScript.
For example:
<a href="javascript:...">abc</a>
will render as:
<a href="javascript:...">abc</a>
Recommendation
The package author has decided to remove the xss filter functionality in the latest version of this module. If this feature is not currently being used, you are not affected by the vulnerability. If it is being used, updating to the latest version of the module will break your application.
In order for affected users to mitigate this vulnerability, it is necessary to use an alternative package that provides similar functionality.
Software afectado
Haz clic en una tecnología para ver todas sus vulnerabilidades.
| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de npm | validator | < 2.0.0 | 2.0.0 |
Referencias
- https://nvd.nist.gov/vuln/detail/CVE-2014-9772
- https://github.com/chriso/validator.js/issues/181
- https://github.com/advisories/GHSA-79mx-88w7-8f7q
- https://github.com/chriso/validator.js
- https://www.npmjs.com/advisories/43
- http://www.openwall.com/lists/oss-security/2016/04/20/11
- http://www.securityfocus.com/bid/97102
- Vector CVSS
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Debilidad (CWE)
CWE-79- Plataforma
- npm
- Paquete
validator- Publicada
- 06.11.2018
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-79mx-88w7-8f7q - CC BY 4.0
Historial de vulnerabilidades: validator
Todas las vulnerabilidades publicadas de este paquete (Paquete de npm), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 10
- Primera → última
- 10.2017 11.2025
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 2
- Media 8
Divulgaciones por año
- 2017: 4
- 2018: 1
- 2019: 0
- 2020: 1
- 2021: 2
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 2
- 2026: 0
-
XSS Filter Bypass via Encoded URL in validator esta entrada
Identifica las vulnerabilidades de tu aplicación
Con la integración de DockRay y el inventario de software activado, DockRay compara las versiones notificadas de los componentes con las vulnerabilidades conocidas y avisa de las coincidencias confirmadas. La cobertura depende de la tecnología compatible y de los avisos disponibles.