Medium severity4.8NVD Advisory· Published Nov 1, 2021· Updated Jun 17, 2026
CVE-2021-39340
CVE-2021-39340
Description
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.
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Affected products
3- Range: <=7.2.4
- Notification – Custom Notifications and Alerts for WordPress/Notification – Custom Notifications and Alerts for WordPressv5Range: 7.2.4
Patches
Vulnerability mechanics
References
3- plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/Utils/Settings.phpnvdPatchThird Party Advisory
- github.com/BigTiger2020/word-press/blob/main/Notification.mdnvdExploitThird Party Advisory
- wordfence.com/vulnerability-advisories/nvdThird Party Advisory
News mentions
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