WP Courses LMS < 2.0.44 - Authenticated Stored XSS via Video Embed Code

2021-08-1600:00:00

Tri Wanda Septian

275

0.001 Low

EPSS

Percentile

24.8%

JSON

The plugin does not sanitise its Video Embed Code, allowing malicious code to be injected in it by high privilege users, even when the unfiltered_html capability is disallowed, which could lead to Stored Cross-Site Scripting issues

1. On the dashboard, navigate to WP Courses > Courses > Add New > Video Embed Code (iframe) (in the Post settings), inject with <iframe> XSS payload, such as <iframe src="javascript:alert(document.cookie)"></iframe>;  <iframe src="javascript:%61%6c%65%72%74%28%64%6f%63%75%6d%65%6e%74%2e%63%6f%6f%6b%69%65%29"></iframe>

2. Click Update, and to trigger XSS payload, open URL path of course

0.001 Low

EPSS

Percentile

24.8%

JSON

Related for WPEX-ID:BFBB32AC-9EF9-46DE-8E5E-7D6D6FB868D8