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

# Using application functionality to exploit insecure deserialization

> PortSwigger Web Security Academy lab: Using application functionality to exploit insecure deserialization. Topic: Insecure Deserialization.

# Using application functionality to exploit insecure deserialization

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> PortSwigger · Insecure Deserialization</p>

<div className="machine-meta">
  | ·            | ·                                                                                                                                                               |
  | ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Platform     | PortSwigger Web Security Academy                                                                                                                                |
  | Topic        | Insecure Deserialization                                                                                                                                        |
  | Difficulty   | <span className="dbadge dbadge-medium">PRACTITIONER</span>                                                                                                      |
  | Official lab | [Open](https://portswigger.net/web-security/deserialization/exploiting/lab-deserialization-using-application-functionality-to-exploit-insecure-deserialization) |
</div>

## Solve the lab

| Language | Author          | Format | Link                                                                                                                                                            |
| -------- | --------------- | ------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 🇬🇧 EN  | **PortSwigger** | Texto  | [Open](https://portswigger.net/web-security/deserialization/exploiting/lab-deserialization-using-application-functionality-to-exploit-insecure-deserialization) |

## Resources by skill

| Skill                    | Source      | Link                                                         |
| ------------------------ | ----------- | ------------------------------------------------------------ |
| Insecure Deserialization | PortSwigger | [Open](https://portswigger.net/web-security/deserialization) |

## Related skills

[Insecure Deserialization](/en/skills/insecure-deserialization)

***

## Comments & tips

Solved this lab a different way? Share it here — comments live in [GitHub Discussions](https://github.com/FFuson/HTB_Writeups/discussions).

<div className="rootea-giscus-wrap" data-giscus-term="lab:deserialization-exploiting-deserialization-using-application-functionality-to-exploit-insecure-deserialization" data-giscus-lang="en" />

*Last updated: 2026-05-08*

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