WordPress Plugin Vulnerabilities

WP Blog and Widget < 2.3.1 - Contributor+ Stored XSS via Shortcode

Description

The plugin does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.

Proof of Concept

Note: First, you need to add a Blog Post at http://localhost/wp-admin/edit.php?post_type=blog_post

Exploit shortcode:

[recent_blog_post grid='1" onmouseover="alert(1)"']

Affects Plugins

Fixed in 2.3.1

References

Classification

Type
XSS
CWE

Miscellaneous

Original Researcher
Lana Codes
Submitter
Lana Codes
Submitter website
Submitter twitter
Verified
Yes

Timeline

Publicly Published
2023-01-12 (about 1 years ago)
Added
2023-01-12 (about 1 years ago)
Last Updated
2023-01-12 (about 1 years ago)

Other