CVE-2023-51540: Kunalnagar Custom 404 Pro

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kunal Nagar Custom 404 Pro allows Stored XSS.This issue affects Custom 404 Pro: from n/a through 3.10.0.

Affected products

• Kunalnagar Custom 404 Pro: up to and including 3.10.0

Published 2024-02-01. Last modified 2026-06-17.