CVE-2026-87111 User Registration PRO WordPress Plugin - Stored XSS

User Registration PRO WordPress plugin <= 6.2.9 contains a stored cross-site scripting caused by insufficient input sanitization of the HTTP Referer header, letting unauthenticated attackers inject scripts executed when users access the page, exploit requires access to the vulnerable AJAX endpoint nonce.

CVSS base score 7.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Stored Xss
Impact
Stored Xss
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Published
16 October 2026
Updated
16 October 2026
Weakness
CWE-79

Vendor fix

Update to a version later than 6.2.9 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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