CVE-2021-36855 MEDIUM

CVE-2021-36855: WordPress Booking Ultra Pro plugin <= 1.1.4 - Cross-Site Scripting (XSS) via Cross-Site Request Forgery (CSRF) vulnerability

Vendor Booking Ultra Pro
Product Booking Ultra Pro (WordPress plugin)
Weakness CWE-352 · CSRF
Published September 30, 2022
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

6.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Cross-Site Scripting (XSS) via Cross-Site Request Forgery (CSRF) vulnerability in Booking Ultra Pro plugin <= 1.1.4 at WordPress.

Explanation of Vulnerability in Simple Terms

02Summary

Booking Ultra Pro versions up to 1.1.4 are vulnerable to cross-site request forgery (CSRF) attacks. An attacker can craft a malicious webpage that, when visited by a logged-in site administrator, performs unwanted actions on the site without the admin's knowledge or consent. The vulnerability requires the admin to visit the attacker's page while authenticated to WordPress.

What an attacker can do

03Attacker Capabilities

Perform unwanted actions on the site by tricking an authenticated admin into visiting a malicious webpage.

Potential impact on your site

04Site Impact

An attacker could modify plugin settings, create bookings, or change site configuration if an admin visits a malicious link.

Conditions required to exploit

05Prerequisites

Site admin must be logged into WordPress and visit an attacker-controlled webpage.

Key dates

06Disclosure timeline

September 30, 2022 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE

CVE-2026-57766 WordPress WPIDE – File Manager & Code Editor plugin <= 3.5.6 - Cross Site Request Forgery (CSRF) vulnerability CVE-2026-15988 AI Engine <= 3.6.5 - Cross-Site Request Forgery to Privilege Escalation via REQUEST_URI Substring Match CVE-2026-63265 Joomla Extension - regularlabs.com - Inconsistent CSRF token checks / privilege checks in various Regular Labs extension AJAX endpoints CVE-2026-12409 Landing Page Builder <= 1.5.3.6 - Cross-Site Request Forgery to ulpb_admin_data AJAX Action CVE-2025-14469 Theme Editor <= 3.1 - Cross-Site Request Forgery to CSS Modification