---
id: CVE-2026-2487
title: >-
  The Admin Custom Login plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via admin settings in all versions up to, and including, 3.6.4 due
  to insufficient input sanitization and output escaping
summary: >-
  The Admin Custom Login plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via admin settings in all versions up to, and including, 3.6.4 due
  to insufficient input sanitization and output escaping. This makes it possible
  fo…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-08-16'
updated: '2026-08-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-2487'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/admin-custom-login/tags/3.6.3/includes/login-form-setting/login-form-background.php#L759
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/admin-custom-login/tags/3.6.3/login-form-screen.php#L162
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/admin-custom-login/trunk/includes/login-form-setting/login-form-background.php#L759
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/admin-custom-login/trunk/login-form-screen.php#L162
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3510948%40admin-custom-login&new=3510948%40admin-custom-login
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/0e81b6c1-5af5-4ad4-92db-9dba76399857?source=cve
    label: security@wordfence.com
tags:
  - nvd
ingestedAt: '2026-08-16T13:39:06.020Z'
epss: 0.00203
epssPercentile: 0.10574
---

## Overview

The Admin Custom Login plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.6.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

## Remediation

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