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Vulnerabilities

Vulnerability · CVE-2026-87111

User Registration PRO <= 6.2.9 - Unauthenticated Stored Cross-Site Scripting via HTTP Referer Header

Published Oct 15, 2026 · catalog updated Oct 16, 2026 · WordPress User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin

Check if you run it

No confirmed exploitation is on record for CVE-2026-87111. EPSS is 0.19%. Act only if a listed version of WordPress User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.19%
Remediation
Version ranges on file
Affected products
stated User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin · wordpress user-registration-pro

The User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via HTTP Referer Header in all versions up to, and including, 6.2.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is present only in the premium build of the plugin and is not present in the free WordPress.org distribution. The nonce required to call the vulnerable AJAX endpoint is localized into the page source of every front-end page for anonymous visitors, making it fully obtainable by unauthenticated attackers.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin<= 6.2.9
  • wordpress user-registration-proversion unspecified

How to fix CVE-2026-87111

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-87111. EPSS is 0.19%. Act only if a listed version of WordPress User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin is installed.

Which versions are affected?

Compare what you have installed with User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin <= 6.2.9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2026 · NIST NVD

    Detected

    The User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via HTTP Referer Header in all versions up to, and including, 6.2.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will ex

Sources

  • CVE.orgVulnerability recordCVE-2026-87111

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-87111

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-87111

    The User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via HTTP Referer Header in all versions up to, and including, 6.2.9 due to insufficient input sanitization and out

    nvd.nist.gov
  • Wordfence IntelligencePackage advisoryCVE-2026-87111

    The User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via HTTP Referer Header in all versions up to, and including, 6.2.9 due to insufficient input sanitization and out

    wordfence.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.