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Description

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.

PUBLISHED Reserved 2026-03-13 | Published 2026-04-22 | Updated 2026-04-22 | Assigner Wordfence




MEDIUM: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-352 Cross-Site Request Forgery (CSRF)

Product status

Default status
unaffected

Any version
affected

Timeline

2026-04-21:Disclosed

Credits

Muhammad Nur Ibnu Hubab finder

References

www.wordfence.com/...-21e8-447c-94da-8241c7d66c29?source=cve

plugins.trac.wordpress.org/...optin/trunk/wpo_admin_page.php

plugins.trac.wordpress.org/...in/tags/1.4/wpo_admin_page.php

plugins.trac.wordpress.org/...optin/trunk/wpo_admin_page.php

plugins.trac.wordpress.org/...in/tags/1.4/wpo_admin_page.php

plugins.trac.wordpress.org/...optin/trunk/wp-popup-optin.php

plugins.trac.wordpress.org/...in/tags/1.4/wp-popup-optin.php

plugins.trac.wordpress.org/...optin/trunk/wpo_admin_page.php

plugins.trac.wordpress.org/...in/tags/1.4/wpo_admin_page.php

plugins.trac.wordpress.org/...optin/trunk/wpo_admin_page.php

plugins.trac.wordpress.org/...in/tags/1.4/wpo_admin_page.php

cve.org (CVE-2026-4131)

nvd.nist.gov (CVE-2026-4131)

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