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CVE-2026-12409— Landing Page Builder <= 1.5.3.6 - Cross-Site Request Forgery to ulpb_admin_data AJAX Action

Quick assessment

Affected
umarbajwa Landing Page Builder – Coming Soon page, Maintenance Mode, Lead Page, WordPress Landing Pages
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.

umarbajwa Landing Page Builder是umarbajwa个人开发者的一款WordPress页面构建插件。 umarbajwa Landing Page Builder 1.5.3.6及之前版本存在跨站请求伪造漏洞，该漏洞源于对ulpb_admin_ajax函数的nonce验证缺失或不正确，可能导致未经身份验证的攻击者通过伪造请求创建、更新、重命名或更改任意文章的状态、别名、类型以及写入ULPB_DATA文章元数据。

CVSS 4.3 · Medium EPSS 0.19% · P8

Affected Version Matrix 1

VendorProduct Version RangeStatus
umarbajwa Landing Page Builder – Coming Soon page, Maintenance Mode, Lead Page, WordPress Landing Pages ≤ 1.5.3.6 affected
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I. Basic Information for CVE-2026-12409

Vulnerability Information
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Vulnerability Title
Landing Page Builder <= 1.5.3.6 - Cross-Site Request Forgery to ulpb_admin_data AJAX Action
Source: CVE Program / CVE List V5
Vulnerability Description
The Landing Page Builder – Coming Soon page, Maintenance Mode, Lead Page, WordPress Landing Pages plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.5.3.6. This is due to missing or incorrect nonce validation on the ulpb_admin_ajax function. This makes it possible for unauthenticated attackers to create, update, retitle, or change the post status, slug, and type of arbitrary posts and write ULPB_DATA post meta via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. This attack requires the victim to hold an editor-level or administrator session, as the wp_ajax_ulpb_admin_data action enforces a capability check that the forged request must satisfy by inheriting the logged-in user's session cookies.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
umarbajwa Landing Page Builder 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
umarbajwa Landing Page Builder是umarbajwa个人开发者的一款WordPress页面构建插件。 umarbajwa Landing Page Builder 1.5.3.6及之前版本存在跨站请求伪造漏洞，该漏洞源于对ulpb_admin_ajax函数的nonce验证缺失或不正确，可能导致未经身份验证的攻击者通过伪造请求创建、更新、重命名或更改任意文章的状态、别名、类型以及写入ULPB_DATA文章元数据。
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
umarbajwa Landing Page Builder – Coming Soon page, Maintenance Mode, Lead Page, WordPress Landing Pages 0 ~ 1.5.3.6 -

II. Public POCs for CVE-2026-12409

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III. Intelligence Information for CVE-2026-12409

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Vendor Advisories for CVE-2026-12409 (1)

IV. Related Vulnerabilities

Same vendor: umarbajwa
Same weakness: CWE-352

V. Comments for CVE-2026-12409

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