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TI-2026-75229 Aliases CVE-2026-87111GHSA-x942-x6h9-wgpp

Stored cross-site scripting in WPEverest User Registration PRO

Priority LOW 31CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
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 User Registration PRO plugin for WordPress by WPEverest is affected in all versions up to and including 6.2.9. Insufficient input sanitization and output escaping (CWE-79) let an attacker store arbitrary web scripts that run in pages. An unauthenticated attacker can inject these scripts through the HTTP Referer header, and they execute whenever a user accesses an injected page. The flaw exists only in the premium build, not in the free WordPress.org distribution.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0019 8th percentileScored 2026-11-07
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

VendorProductAffected versionsFixed inStatusSource
wpeverestUser Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Pluginup to 6.2.9—No fix listedCNA
  • User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin Vendorwpeverest Affected up to 6.2.9 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for User Registration PRO.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-87111
  2. 2026-10-16 Alias added: GHSA-x942-x6h9-wgpp

References

Other 2

  • TI-2025-00958 Everest Forms <= 3.0.9.4 - Unauthenticated Arbitrary File Upload, Read, and Deletion CVSS 3.1CRITICAL 9.8
  • TI-2026-02850 Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field CVSS 3.1CRITICAL 9.8
  • TI-2026-01188 User Registration & Membership <= 5.1.2 - Unauthenticated Privilege Escalation via Membership Registration CVSS 3.1CRITICAL 9.8
  • TI-2025-02262 User Registration & Membership < 4.1.3 - Authentication Bypass CVSS 3.1HIGH 8.1
  • TI-2025-02232 User Registration & Membership < 4.1.2- Unauthenticated Privilege Escalation CVSS 3.1HIGH 8.1
  • TI-2022-03588 User Registration < 2.2.4.1 - Subscriber+ Arbitrary File Upload CVSS 3.1HIGH 7.5
See all 80 →

Sources

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