Vulnerability · Published Nov 1, 2021 · Assigned by Wordfence

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

Medium 4.8

In plain English

A medium-severity cross-site scripting in Notification – Custom Notifications and Alerts for WordPress from Notification – Custom Notifications and Alerts for WordPress. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities).

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.9%top 39.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Notification – Custom Notifications and Alerts for WordPress	Notification – Custom Notifications and Alerts for WordPress	7.2.4 – through 7.2.4

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/BigTiger2020/word-press/blob/main/Notification.md x_refsource_MISC
https://wordfence.com/vulnerability-advisories/#CVE-2021-39340 x_refsource_MISC
https://plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/Utils/Settings.php#L167 x_refsource_MISC