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WordPress Plugin Vulnerabilities

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

Description

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

Proof of Concept

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 

Affects Plugins

wp-courses
Fixed in version 2.0.44

References

CVE
CVE-2021-24621

Classification

Type

XSS

OWASP top 10
A7: Cross-Site Scripting (XSS)
CWE
CWE-79

Miscellaneous

Original Researcher

Tri Wanda Septian

Submitter

Tri Wanda Septian

Submitter website
https://twseptian.github.io
Submitter twitter
twseptian_
Verified

Yes

WPVDB ID
bfbb32ac-9ef9-46de-8e5e-7d6d6fb868d8

Timeline

Publicly Published

2021-08-16 (about 9 months ago)

Added

2021-08-16 (about 9 months ago)

Last Updated

2022-04-08 (about 1 months ago)

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