CVE-2024-5020 MEDIUM

CVE-2024-5020: Multiple Plugins <= (Various Versions) - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via FancyBox JavaScript Library

Vendor Extendthemes
Product Colibri Page Builder
Weakness CWE-79 · XSS
Published December 4, 2024
Last update April 8, 2026

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

Multiple plugins for WordPress are vulnerable to Stored Cross-Site Scripting via the plugin's bundled FancyBox JavaScript library (versions 1.3.4 to 3.5.7) in various versions 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

Colibri Page Builder versions up to 1.0.286 contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts. The vulnerability affects the page builder interface and can impact other users viewing affected pages. An attacker with low-level access can inject code that executes in the browsers of site visitors and administrators.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that runs in other users' browsers when they view affected pages.

Potential impact on your site

04Site Impact

Attackers with contributor access can deface pages, steal admin credentials, or redirect visitors to malicious sites.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege account (e.g., contributor or editor role) on the site.

Key dates

06Disclosure timeline

December 4, 2024 CVE published
April 8, 2026 Record updated

Related vulnerabilities

08Related CVE