User Submitted Posts – Enable Users to Submit Posts from the Front End <= 20230811 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2023-4779
CVSS 6.4 (Medium)
Publicly Published September 5, 2023
Last Updated September 6, 2023
Researcher NGÔ THIÊN AN (ancorn_) - VNPT-VCI


The User Submitted Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's [usp_gallery] shortcode in versions up to, and including, 20230811 due to insufficient input sanitization and output escaping on user supplied attributes like 'before'. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.



1 affected software package

Software Type Plugin
Software Slug user-submitted-posts (view on
Patched? Yes
Remediation Update to version 20230901, or a newer patched version
Affected Version
  • <= 20230811
Patched Version
  • 20230901

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