GHSA-8mx2-rjh8-q3jq
copyparty Reflected XSS via Filter Parameter
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
### Summary
Unauthorized reflected Cross-Site-Scripting when accessing the URL for recent uploads with the `filter` parameter containing JavaScript code.
### Details
When accessing the recent uploads page at `/?ru`, users can filter the results using an input field at the top. This field appends a filter parameter to the URL, which reflects its value directly into a `<script>` block without proper escaping.
This vulnerability allows for reflected Cross-Site Scripting (XSS) and can be exploited against both authenticated and unauthenticated users, enabling unwanted actions in the victims browser.
### PoC
A URL like this will execute `alert(1)`:
```
https://127.0.0.1:3923/?ru&filter=</script><script>alert(1)</script>
```
References
External links from the advisory. They lead to third-party sites.