sphex1987 WP Responsive Popup and Optin Plugin up to 1.4 on WordPress Setting wpo_admin_page.php wpo_image_url cross-site request forgery

Summaryinfo

A vulnerability classified as problematic was found in sphex1987 WP Responsive Popup and Optin Plugin up to 1.4 on WordPress. This affects an unknown function of the file wpo_admin_page.php of the component Setting Handler. The manipulation of the argument wpo_image_url results in cross-site request forgery. This vulnerability is identified as CVE-2026-4131. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in sphex1987 WP Responsive Popup and Optin Plugin up to 1.4 on WordPress. Affected is an unknown function of the file wpo_admin_page.php of the component Setting Handler. The manipulation of the argument wpo_image_url with an unknown input leads to a cross-site request forgery vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

The WP Responsive Popup + Optin plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 1.4. This is due to the settings form on the admin page (wpo_admin_page.php) lacking nonce generation (wp_nonce_field) and verification (wp_verify_nonce/check_admin_referer). This makes it possible for unauthenticated attackers to update all plugin settings including the 'wpo_image_url' parameter via a forged request, granted they can trick a site administrator into performing an action such as clicking a link.

The weakness was released by Muhammad Nur Ibnu Hubab. The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-4131 since 03/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

By approaching the search of inurl:wpo_admin_page.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.4 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• sphex1987

Name

• WP Responsive Popup and Optin Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4

CPE 2.3info

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CPE 2.2info

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