CVE-2021-39340 MEDIUM

CVE-2021-39340: Notification – Custom Notifications and Alerts for WordPress <= 7.2.4 Authenticated Stored Cross-Site Scripting

Vendor Notification – Custom Notifications And Alerts For Wordpress
Product Notification – Custom Notifications and Alerts for WordPress
Weakness CWE-79 · XSS
Published November 1, 2021
Last update March 31, 2025
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The Notification WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/src/classes/Utils/Settings.php file which made it possible for attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 7.2.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.

Key dates

02Disclosure timeline

November 1, 2021 CVE published
March 31, 2025 Record updated

Related vulnerabilities

04Related CVE

CVE-2025-57706 File Station 5 CVE-2025-23481 WordPress Ni WooCommerce Sales Report Email plugin <= 3.1.4 - Reflected Cross Site Scripting (XSS) vulnerability CVE-2023-5252 FareHarbor for WordPress <= 3.6.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVE-2023-40676 WordPress Slimstat Analytics Plugin <= 5.0.8 is vulnerable to Cross Site Scripting (XSS) CVE-2024-51699 WordPress Buooy Sticky Header plugin <= 0.5.2 - Reflected Cross Site Scripting (XSS) vulnerability