CVE-2021-39340

low-risk
Published 2021-11-01

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.

Do I need to act?

-
0.69% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.8/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Notification

Affected Vendors

Bracketspace

References (6)

Exploit https://github.com/BigTiger2020/word-press/blob/main/Notification.md
Patch https://plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/U...
Third Party Advisory https://wordfence.com/vulnerability-advisories/#CVE-2021-39340
Exploit https://github.com/BigTiger2020/word-press/blob/main/Notification.md
Patch https://plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/U...
Third Party Advisory https://wordfence.com/vulnerability-advisories/#CVE-2021-39340
26
/ 100
low-risk
Severity 19/34 · Moderate
Exploitability 2/34 · Minimal
Exposure 5/34 · Minimal