umarbajwa Landing Page Builder Plugin up to 1.5.3.6 on WordPress Admin AJAX ulpb_admin_ajax cross-site request forgery

Summaryinfo

A vulnerability classified as problematic was found in umarbajwa Landing Page Builder Plugin up to 1.5.3.6. Affected by this vulnerability is the function ulpb_admin_ajax of the component Admin AJAX Handler. Executing a manipulation can lead to cross-site request forgery. This vulnerability is handled as CVE-2026-12409. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in umarbajwa Landing Page Builder Plugin up to 1.5.3.6. It has been declared as problematic. This vulnerability affects the function ulpb_admin_ajax of the component Admin AJAX Handler. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-12409 since 06/16/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-44858). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• umarbajwa

Name

• Landing Page Builder Plugin

Version

• 1.5.3.0
• 1.5.3.1
• 1.5.3.2
• 1.5.3.3
• 1.5.3.4
• 1.5.3.5
• 1.5.3.6

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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