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TI-2023-01900 Aliases CVE-2023-2023GHSA-2h88-qxq3-v97j

Custom 404 Pro < 3.7.3 - Reflected Cross-Site Scripting

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0171 77th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed Custom 404 Pro (Unknown): 3.7.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownCustom 404 Probefore 3.7.33.7.3Patch availableCNA
  • Custom 404 Pro VendorUnknown Affected before 3.7.3 Fixed in 3.7.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kunalnagar:custom_404_pro:*:*:*:*:*:wordpress:*:*before 3.7.3VulnerableKunal Nagar
  • cpe:2.3:a:kunalnagar:custom_404_pro:*:*:*:*:*:wordpress:*:* Versions before 3.7.3 Vulnerable ·Kunal Nagar

Remediation

  • Fix · CNA Custom 404 Pro (Unknown) Fixed in 3.7.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-2023
  2. 2026-10-03 Alias added: GHSA-2h88-qxq3-v97j

References

Exploit 1

  • TI-2023-01909 Custom 404 Pro < 3.8.1 - Multiple SQL Injection CVSS 3.1CRITICAL 9.8
  • TI-2022-23643 WordPress Custom 404 Pro Plugin <= 3.7.0 is vulnerable to SQL Injection (SQLi) CVSS 3.1HIGH 8.3
  • TI-2024-26570 WordPress Custom 404 Pro plugin <= 3.11.1 - Reflected Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
  • TI-2023-28192 WordPress Custom 404 Pro Plugin <= 3.10.0 is vulnerable to Cross Site Scripting (XSS) CVSS 3.1HIGH 7.1
  • TI-2019-10995 The Custom 404 Pro plugin 3.2.8 for WordPress has XSS via the wp-admin/admin.php?page=c4p-main page parameter. CVSS 3.0MEDIUM 6.1
  • TI-2019-11905 The custom-404-pro plugin before 3.2.8 for WordPress has reflected XSS, a different vulnerability than CVE-2019-14789. CVSS 3.0MEDIUM 6.1
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences