TI-2021-16707 Aliases CVE-2021-39340 GHSA-f83v-8qph-hgj6

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

LOW 24CWE-79Published 2021-11-01 · Updated 2025-03-31

Key facts

Attack vector: Network
Privileges required: High
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0093 60th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Notification – Custom Notifications and Alerts for WordPress	Notification – Custom Notifications and Alerts for WordPress	7.2.4 – 7.2.4	—	No fix listed	CNA

Notification – Custom Notifications and Alerts for WordPress VendorNotification – Custom Notifications and Alerts for WordPress Affected 7.2.4 – 7.2.4 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:bracketspace:notification::::::wordpress::*	up to 7.2.4	Vulnerable	BracketSpace

cpe:2.3:a:bracketspace:notification:*:*:*:*:*:wordpress:*:* Versions up to 7.2.4 Vulnerable ·BracketSpace

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-39340
2026-10-03 Alias added: GHSA-f83v-8qph-hgj6

References

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences