CVE-2023-2023

MediumPublished

Custom 404 Pro < 3.7.3 - Reflected Cross-Site Scripting

Published: May 30, 2023
Updated: Jan 9, 2025
Assigning CNA: WPScan
Evidence observed: Aug 5, 2026

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

1.7%

Low · next 30 days

Percentile: 77.0%
Model date: Oct 17, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

Repository evidence: Files: 1 · Repositories: 1

1 Template

Custom 404 Pro < 3.7.3 - Cross-Site ScriptingTemplate
http/cves/2023/CVE-2023-2023.yaml
Nuclei Templates
DetectionEvidence observed: Sep 26, 2026Revision: 17f5725dc10cRelated tool
Declared conditions
- network: http($.protocol_keys)
- verification: dsl($.matchers[*].type)

Hvv2023PoC
HW2023@POC@EXP@CVE-2023-2023

Responsible use

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