XSS in Rafasashi Custom New User Notification

CVE-2026-3551

The Custom New User Notification plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's admin settings in all versions up to, and including, 1.2.0. This is due to insufficient input sanitization and output escap…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (8.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-3551?
CVE-2026-3551 is a medium-severity vulnerability in Rafasashi Custom New User Notification, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-04-16.
How severe is CVE-2026-3551?
Medium severity. CVSS v3 base score is 4.4 out of 10.