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.
References (3)
Core 3
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/BigTiger2020/word-press/blob/main/Notification.md
Third Party Advisory x_refsource_misc
https://wordfence.com/vulnerability-advisories/#CVE-2021-39340
Patch, Third Party Advisory x_refsource_misc
https://plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/Utils/Settings.php#L167
Scores
CVSS v3
4.8
EPSS
0.0069
EPSS Percentile
71.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (1)
bracketspace/notification
< 7.2.4
Published
Nov 01, 2021
Tracked Since
Feb 18, 2026