---
id: CVE-2025-13737
title: >-
  The Nextend Social Login and Register plugin for WordPress is vulnerable to
  Cross-Site Request Forgery in all versions up to, and including, 3.1.21
summary: >-
  The Nextend Social Login and Register plugin for WordPress is vulnerable to
  Cross-Site Request Forgery in all versions up to, and including, 3.1.21. This
  is due to missing or incorrect nonce validation on the 'unlinkUser' function.
  This …
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-352
published: '2025-11-28'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T23:10:00.237'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-13737'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/nextend-facebook-connect/tags/3.1.21/includes/provider.php#L772
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3404174/nextend-facebook-connect/trunk/includes/provider.php
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/9c6b747e-d267-4fd3-a4fd-022aa657c796?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00151
epssPercentile: 0.0362
ingestedAt: '2026-09-30T23:29:32.476Z'
---

## Overview

The Nextend Social Login and Register plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.1.21. This is due to missing or incorrect nonce validation on the 'unlinkUser' function. This makes it possible for unauthenticated attackers to unlink the user's social login via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.