Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Kunal Nagar Custom 404 Pro allows Reflected XSS.This issue affects Custom 404 Pro: from n/a through 3.11.1.
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.
The Custom 404 Pro WordPress plugin before 3.7.3 does not escape some URLs before outputting them in attributes, leading to Reflected Cross-Site Scripting.