CVE-2026-4131— WP Responsive Popup + Optin <= 1.4 - Cross-Site Request Forgery to Stored Cross-Site Scripting via 'wpo_image_url' Parameter
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I. Basic Information for CVE-2026-4131
Vulnerability Information
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Vulnerability Title
WP Responsive Popup + Optin <= 1.4 - Cross-Site Request Forgery to Stored Cross-Site Scripting via 'wpo_image_url' Parameter
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨站请求伪造(CSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin WP Responsive Popup + Optin 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin WP Responsive Popup + Optin 1.4及之前版本存在跨站请求伪造漏洞，该漏洞源于设置表单缺少随机数生成和验证，可能导致未经身份验证的攻击者通过伪造请求更新插件设置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| sphex1987 | WP Responsive Popup + Optin | 0 ~ 1.4 | - |
II. Public POCs for CVE-2026-4131
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-352
- CVE-2021-47953
OpenCart 3.0.3.7 Cross-Site Request Forgery via account/pass - CVE-2021-47946
OpenCart 3.0.36 Account Takeover via Cross Site Request Forg - CVE-2022-50955
WordPress Plugin Curtain 1.0.2 Cross-site Request Forgery - CVE-2026-8194
osTicket Dispatcher class.dispatcher.php cross-site request - CVE-2026-42286
Emlog: Cross-Site Request Forgery in Admin Functions
V. Comments for CVE-2026-4131
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