WWBN AVideo is an open source video platform. Prior to version 26.0, the `deleteDump` parameter in `plugin/CloneSite/cloneServer.json.php` is passed directly to `unlink()` without any path sanitization. An attacker with valid clone credentials can use path traversal sequences (e.g., `../../`) to delete arbitrary files on the server, including critical application files such as `configuration.php`, causing complete denial of service or enabling further attacks by removing security-critical files. Version 26.0 fixes the issue.

Affected: Packagist: wwbn/avideo

## Summary

The `deleteDump` parameter in `plugin/CloneSite/cloneServer.json.php` is passed directly to `unlink()` without any path sanitization. An attacker with valid clone credentials can use path traversal sequences (e.g., `../../`) to delete arbitrary files on the server, including critical application files such as `configuration.php`, causing complete denial of service or enabling further attacks by removing security-critical files.

## Details

In `plugin/CloneSite/cloneServer.json.php`, the `$clonesDir` variable is set to the application's storage path appended with `clones/` (line 11). When a `deleteDump` GET parameter is provided, its value is concatenated directly into a path passed to `unlink()` with no validation:

```php // plugin/CloneSite/cloneServer.json.php:10-11 $videosDir = Video::getStoragePath() . ""; $clonesDir = "{$videosDir}clones/"; ```

```php // plugin/CloneSite/cloneServer.json.php:44-46 if (!empty($_GET['deleteDump'])) { $resp->error = !unlink("{$clonesDir}{$_GET['deleteDump']}"); $resp->msg = "Delete Dump {$_GET['deleteDump']}"; die(json_encode($resp)); } ```

The intended functionality is to delete SQL dump files generated during the clone process (named via `uniqid()` at line 58). However, because `$_GET['deleteDump']` is never passed through `basename()`, `realpath()`, or any other path normalization function, an attacker can supply directory traversal sequences to escape the `$clonesDir` directory.

Given a typical `$clonesDir`…