CVE-2026-1804 MEDIUM

CVE-2026-1804: WDES Responsive Popup <= 1.3.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'attr' Shortcode Attribute

Vendor Master-Buldog
Product WDES Responsive Popup
Weakness CWE-79 · XSS
Published February 11, 2026
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

6.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The WDES Responsive Popup plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'wdes-popup-title' shortcode in all versions up to, and including, 1.3.6 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Explanation of Vulnerability in Simple Terms

02Summary

WDES Responsive Popup versions 1.3.6 and earlier contain a cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, including site administrators. The vulnerability has scope change, meaning the impact extends beyond the vulnerable component itself.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in other users' browsers, potentially stealing session tokens or admin credentials.

Potential impact on your site

04Site Impact

Any authenticated user can compromise other users' sessions or steal admin credentials through script injection.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege user account on the site; no user interaction required from victims.

Key dates

06Disclosure timeline

February 11, 2026 CVE published
April 8, 2026 Record updated