Custom 404 Pro <= 3.10.0 - Unauthenticated Stored Cross-Site Scripting via logging

7.2
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2023-51540
CVSS 7.2 (High)
Publicly Published December 27, 2023
Last Updated January 22, 2024
Researcher Kyle Sanchez

Description

The Custom 404 Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via several logged parameters in all versions up to, and including, 3.10.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

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Vulnerability Details for Custom 404 Pro

Software Type Plugin
Software Slug custom-404-pro (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.10.1, or a newer patched version
Affected Version
  • <= 3.10.0
Patched Version
  • 3.10.1

Recent vulnerabilities in Custom 404 Pro

# Title CVE ID CVSS Researchers Date
1 Custom 404 Pro <= 3.12.0 - Authenticated (Administrator+) SQL Injection via `path` Parameter CVE-2025-9947 4.9 jamaal October 10, 2025
2 Custom 404 Pro <= 3.12.0 - Cross-Site Request Forgery CVE-2025-62880 4.3 TaiYou May 13, 2025
3 Custom 404 Pro <= 3.11.1 - Reflected Cross-Site Scripting CVE-2024-39646 6.1 Dimas Maulana August 1, 2024
4 Custom 404 Pro <= 3.8.1 - Reflected Cross-Site Scripting via 'page' CVE-2023-32740 6.1 LEE SE HYOUNG May 15, 2023
5 Custom 404 Pro <= 3.7.2 - Reflected Cross-Site Scripting via 's' CVE-2023-2023 6.1 Chien Vuong May 2, 2023
6 Custom 404 Pro <= 3.7.2 - Unauthenticated SQL Injection 9.8 April 25, 2023
7 Custom 404 Pro <= 3.8.0 - Unauthenticated SQL Injection via 's' CVE-2023-2032 9.8 Alex Sanford April 25, 2023
8 Custom 404 Pro <= 3.7.1 - Cross-Site Request Forgery CVE-2023-0385 4.3 Marco Wotschka January 18, 2023
9 Custom 404 Pro <= 3.7.0 - Authenticated (Administrator+) SQL Injection CVE-2022-47605 7.2 minhtuanact January 13, 2023
10 Custom 404 Pro <= 3.2.8 - Reflected Cross-Site Scripting CVE-2019-14789 6.1 June 25, 2019

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