User Submitted Posts <= 20230902 - Unauthenticated Arbitrary File Upload

9.8
Unrestricted Upload of File with Dangerous Type
CVE CVE-2023-45603
CVSS 9.8 (Critical)
Publicly Published October 10, 2023
Last Updated October 13, 2023
Researcher Rafie Muhammad - Awesome Motive, Inc.

Description

The User Submitted Posts plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the usp_attach_images function in versions up to, and including, 20230902. This makes it possible for unauthenticatedattackers to upload arbitrary files as long as the extension does not contain 'php' on the affected site's server which may make remote code execution possible.

Learn more about Arbitrary File Upload vulnerabilities and how to prevent them.

References

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Vulnerability Details for User Submitted Posts – Enable Users to Submit Posts from the Front End

Software Type Plugin
Software Slug user-submitted-posts (view on wordpress.org)
Patched? Yes
Remediation Update to version 20230914, or a newer patched version
Affected Version
  • <= 20230902
Patched Version
  • 20230914

Recent vulnerabilities in User Submitted Posts – Enable Users to Submit Posts from the Front End

# Title CVE ID CVSS Researchers Date
1 User Submitted Posts <= 20260113 - Incorrect Authorization to Unauthenticated Category Restriction Bypass via 'user-submitted-category' Parameter CVE-2026-2126 5.3 type5afe February 17, 2026
2 User Submitted Posts – Enable Users to Submit Posts from the Front End <= 20251210 - Unauthenticated Stored Cross-Site Scripting via Custom Field CVE-2026-0800 7.2 Balamurugan R January 23, 2026
3 User Submitted Posts <= 20260110 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'usp_access' Shortcode CVE-2026-0913 6.4 Muhammad Yudha - DJ January 15, 2026
4 User Submitted Posts <= 20251121 - Unauthenticated Open Redirect CVE-2025-68509 5.3 benzdeus January 1, 2026
5 User Submitted Posts <= 20241026 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2025-2874 4.4 Quang Bach (maysbachs) April 2, 2025
6 User Submitted Posts – Enable Users to Submit Posts from the Front End <= 20240319 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2024-5002 4.4 Guido Iván García June 22, 2024
7 User Submitted Posts <= 20230901 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVE-2023-7251 6.4 Ngô Thiên An (ancorn_) September 6, 2023
8 User Submitted Posts – Enable Users to Submit Posts from the Front End <= 20230811 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVE-2023-4779 6.4 Ngô Thiên An (ancorn_) September 5, 2023
9 User Submitted Posts <= 20230809 - Unauthenticated Stored Cross-Site Scripting via 'user-submitted-content' CVE-2023-4308 7.2 Ngô Thiên An (ancorn_), Phan Trong Quan August 14, 2023
10 User Submitted Posts <= 20190312 - Unauthenticated Arbitrary File Upload CVE-2019-25138 9.8 Jerome Bruandet May 2, 2019

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