> ## Documentation Index
> Fetch the complete documentation index at: https://rootea.es/llms.txt
> Use this file to discover all available pages before exploring further.

# Web shell upload via race condition

> PortSwigger Web Security Academy lab: Web shell upload via race condition. Tema: File Upload Vulnerabilities.

# Web shell upload via race condition

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> PortSwigger · File Upload Vulnerabilities</p>

<div className="machine-meta">
  | ·           | ·                                                                                                             |
  | ----------- | ------------------------------------------------------------------------------------------------------------- |
  | Plataforma  | PortSwigger Web Security Academy                                                                              |
  | Tema        | File Upload Vulnerabilities                                                                                   |
  | Dificultad  | <span className="dbadge dbadge-easy">APPRENTICE</span>                                                        |
  | Lab oficial | [Abrir](https://portswigger.net/web-security/file-upload/lab-file-upload-web-shell-upload-via-race-condition) |
</div>

## Resolver el lab

| Idioma  | Autor           | Formato | Enlace                                                                                                        |
| ------- | --------------- | ------- | ------------------------------------------------------------------------------------------------------------- |
| 🇬🇧 EN | **PortSwigger** | Texto   | [Abrir](https://portswigger.net/web-security/file-upload/lab-file-upload-web-shell-upload-via-race-condition) |

## Recursos por skill

| Skill                       | Fuente      | Enlace                                                        |
| --------------------------- | ----------- | ------------------------------------------------------------- |
| File Upload Vulnerabilities | PortSwigger | [Abrir](https://portswigger.net/web-security/file-upload)     |
| Race Conditions             | PortSwigger | [Abrir](https://portswigger.net/web-security/race-conditions) |

## Skills relacionadas

[File Upload Vulnerabilities](/skills/file-upload) · [Race Conditions](/skills/race-conditions)

***

## Comentarios y truquillos

¿Has resuelto el lab por una vía distinta? Compártela aquí — los comentarios viven en [GitHub Discussions](https://github.com/FFuson/HTB_Writeups/discussions).

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*Última actualización: 2026-05-08*

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