Cross-Site Request Forgery in WP Responsive Popup + Optin Plugin for WordPress
CVE-2026-4131

6.1MEDIUM

Key Information:

Vendor

WordPress
Status
WP Responsive Popup + Optin
Vendor
CVE Published:
22 April 2026

What is CVE-2026-4131?

The WP Responsive Popup + Optin plugin for WordPress is susceptible to a Cross-Site Request Forgery vulnerability caused by the absence of nonce validation on the admin settings form. Attackers can exploit this weakness by tricking an administrator into performing unintended actions, which could lead to unauthorized changes to the plugin settings, including vital parameters such as the 'wpo_image_url'. This vulnerability impacts all versions up to and including version 1.4.

Affected Version(s)

WP Responsive Popup + Optin 0 <= 1.4

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/wp-popup-optin...
https://plugins.trac.wordpress.org/browser/wp-popup-optin...

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muhammad Nur Ibnu Hubab
.