CVE-2023-51540

WordPress Custom 404 Pro Plugin <= 3.10.0 is vulnerable to Cross Site Scripting (XSS)

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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.

La vulnerabilidad de neutralización incorrecta de la entrada durante de generación de páginas web ('cross-site Scripting') en Kunal Nagar Custom 404 Pro permite XSS almacenado. Este problema afecta a Custom 404 Pro: desde n/a hasta 3.10.0.

The Custom 404 Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via several logged parameters in all versions up to, and including, 3.10.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

*Credits: Kyle Sanchez (Patchstack Alliance)

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-12-20 CVE Reserved
2023-12-27 CVE Published
2024-08-02 CVE Updated
2025-01-01 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

CAPEC-592: Stored XSS

References (1)

URL	Tag	Source
https://patchstack.com/database/vulnerability/custom-404-pro/wordpress-custom-404-pro-plugin-3-10-0-cross-site-scripting-xss-vulnerability?_s_id=cve	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Kunalnagar Search vendor "Kunalnagar"		Custom 404 Pro Search vendor "Kunalnagar" for product "Custom 404 Pro"				<= 3.10.0 Search vendor "Kunalnagar" for product "Custom 404 Pro" and version " <= 3.10.0"		wordpress		Affected