### [CVE-2025-24018](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-24018)
![](https://img.shields.io/static/v1?label=Product&message=yeswiki&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%204.5.0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-79%3A%20Improper%20Neutralization%20of%20Input%20During%20Web%20Page%20Generation%20('Cross-site%20Scripting')&color=brightgreen)

### Description

YesWiki is a wiki system written in PHP. In versions up to and including 4.4.5, it is possible for an authenticated user with rights to edit/create a page or comment to trigger a stored XSS which will be reflected on any page where the resource is loaded. The vulnerability makes use of the content edition feature and more specifically of the `{{attach}}` component allowing users to attach files/medias to a page. When a file is attached using the `{{attach}}` component, if the resource contained in the `file` attribute doesn't exist, then the server will generate a file upload button containing the filename. This vulnerability allows any malicious authenticated user that has the right to create a comment or edit a page to be able to steal accounts and therefore modify pages, comments, permissions, extract user data (emails), thus impacting the integrity, availability and confidentiality of a YesWiki instance. Version 4.5.0 contains a patch for the issue.

### POC

#### Reference
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-w59h-3x3q-3p6j

#### Github
No PoCs found on GitHub currently.