Vulnerability · Published Apr 22, 2026 · Assigned by Wordfence

CVE-2026-4131WP Responsive Popup + Optin <= 1.4 - Cross-Site Request Forgery to Stored Cross-Site Scripting via 'wpo_image_url' Parameter

Medium 6.1

In plain English

A medium-severity cross-site request forgery in WP Responsive Popup + Optin from sphex1987. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.2%top 92.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
sphex1987	WP Responsive Popup + Optin	0 – through 1.4

Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References