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CVE-2026-2487— Admin Custom Login <= 3.6.4 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Message Above Login Form' Setting

Quick assessment

Affected
weblizar Admin Custom Login
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Admin Custom Login是WordPress基金会开源的一款自定义网站后台登录页面的插件。 WordPress Admin Custom Login 3.6.4及之前版本存在跨站脚本漏洞，该漏洞源于输入清理和输出转义不足，可能导致具有管理员权限及以上的认证攻击者在页面中注入任意Web脚本，当用户访问时执行。

CVSS 4.4 · Medium EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
weblizar Admin Custom Login ≤ 3.6.4 affected
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I. Basic Information for CVE-2026-2487

Vulnerability Information
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Vulnerability Title
Admin Custom Login <= 3.6.4 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Message Above Login Form' Setting
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Admin Custom Login 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Admin Custom Login是WordPress基金会开源的一款自定义网站后台登录页面的插件。 WordPress Admin Custom Login 3.6.4及之前版本存在跨站脚本漏洞，该漏洞源于输入清理和输出转义不足，可能导致具有管理员权限及以上的认证攻击者在页面中注入任意Web脚本，当用户访问时执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
weblizar Admin Custom Login 0 ~ 3.6.4 -

II. Public POCs for CVE-2026-2487

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III. Intelligence Information for CVE-2026-2487

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Patches & Fixes for CVE-2026-2487 (1)

Vendor Advisories for CVE-2026-2487 (1)

Other References for CVE-2026-2487 (1)

IV. Related Vulnerabilities

Same product: Admin Custom Login
Same vendor: weblizar
Same weakness: CWE-79

V. Comments for CVE-2026-2487

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