High severity7.1NVD Advisory· Published Feb 1, 2024· Updated Jun 17, 2026

CVE-2023-51540

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Kunalnagar/Custom 404 Pro
cpe:2.3:a:kunalnagar:custom_404_pro:*:*:*:*:*:wordpress:*:*
Range: <=3.10.0
WordPress/Custom 404 Prollm-fuzzy
Range: <=3.10.0
Package: https://wordpress.org/plugins/custom-404-pro

Patches

Vulnerability mechanics

References

patchstack.com/database/vulnerability/custom-404-pro/wordpress-custom-404-pro-plugin-3-10-0-cross-site-scripting-xss-vulnerabilitynvdThird Party Advisory

News mentions

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