TI-2026-82415 Aliases CVE-2026-25467 GHSA-f4c7-43hh-f9j3

Cross-site scripting in WordPress User Registration plugin

LOW 24CWE-80Published 2026-10-29 · Updated 2026-10-29

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-80.

Summary

ThemeGrill's User Registration plugin, from n/a through 5.3.0, does not neutralize script-related HTML tags in web pages (CWE-80). An unauthenticated remote attacker can inject script that runs in the browser of users who view the affected page, with low attack complexity and no user interaction required.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in ThemeGrill User Registration user-registration allows Code Injection.This issue affects User Registration: from n/a through 5.3.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00265 18th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
ThemeGrill	User Registration	up to 5.3.0	—	No fix listed	CNA

User Registration VendorThemeGrill Affected up to 5.3.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for User Registration.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-29 Threatist record created from CVE-2026-25467
2026-10-29 Alias added: GHSA-f4c7-43hh-f9j3
2026-10-29 CISA SSVC decision points changed

References

Other 1

https://patchstack.com/database/wordpress/plugin/user-registration/vulnerability/wordpress-user-registration-plugin-5-3-0-content-injection-vulnerability?_s_id=cve

TI-2024-16396 WordPress LMS by Masteriyo plugin <= 1.7.2 - Privilege Escalation vulnerability CVSS 3.1CRITICAL 9.8
TI-2026-51986 WordPress Masteriyo - LMS plugin <= 2.3.2 - Arbitrary File Upload vulnerability CVSS 3.1CRITICAL 9.8
TI-2026-39610 WordPress Registration Form for WooCommerce plugin <= 1.0.9 - Privilege Escalation vulnerability CVSS 3.1CRITICAL 9.8
TI-2026-86554 Privilege escalation in Registration Form for WooCommerce checkout CVSS 3.1CRITICAL 9.8
TI-2020-18616 themegrill-demo-importer before 1.6.2 does not require authentication for wiping the… CVSS 3.1CRITICAL 9.1
TI-2020-18972 ThemeGrill Demo Importer 1.3.4 - 1.6.1 - Authorization Bypass to Site Reset CVSS 3.1CRITICAL 9.9

See all 46 →

Sources

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