EUVD-2026-278422

fkie_cve-2026-34739

WWBN AVideo is an open source video platform. In versions 26.0 and prior, the User_Location plugin's testIP.php page reflects the ip request parameter directly into an HTML input element without applying htmlspecialchars() or any other output encoding. This allows an attacker to inject arbitrary HTML and JavaScript via a crafted URL. Although the page is restricted to admin users, AVideo's SameSite=None cookie configuration allows cross-origin exploitation, meaning an attacker can lure an admin to a malicious link that executes JavaScript in their authenticated session. At time of publication, there are no publicly available patches.

GHSA-jqrj-chh6-8h78 — AVideo: Reflected XSS via Unescaped ip Parameter in User_Location testIP.php

Affected: Packagist: wwbn/avideo

## Summary

The User_Location plugin's `testIP.php` page reflects the `ip` request parameter directly into an HTML input element without applying `htmlspecialchars()` or any other output encoding. This allows an attacker to inject arbitrary HTML and JavaScript via a crafted URL. Although the page is restricted to admin users, AVideo's `SameSite=None` cookie configuration allows cross-origin exploitation, meaning an attacker can lure an admin to a malicious link that executes JavaScript in their authenticated session.

## Details

At `plugin/User_Location/testIP.php:16`, the `ip` parameter is read from the request without sanitization:

```php $ip = $_REQUEST['ip']; ```

At line 34, the value is echoed directly into an HTML input element's `value` attribute:

```php <input type="text" name="ip" id="ip" class="form-control" value="<?php echo $ip; ?>"> ```

No `htmlspecialchars()` is applied, allowing an attacker to break out of the `value` attribute and inject arbitrary HTML/JavaScript.

While the page requires admin authentication to access, AVideo sets session cookies with `SameSite=None`. When an admin clicks a link from an external site (email, chat, another website), their session cookie is sent with the request, and the XSS payload executes in the context of their authenticated admin session.

## Proof of Concept

1. Craft a URL with a payload that breaks out of the input value attribute:

``` https://your-avideo-instance.com/plugin/User_Location/testIP.php?ip="><script>…

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EUVD-2026-278422

fkie_cve-2026-34739

GHSA-jqrj-chh6-8h78 — AVideo: Reflected XSS via Unescaped ip Parameter in User_Location testIP.php