CVE-2021-36899 MEDIUM

CVE-2021-36899: WordPress Asset CleanUp: Page Speed Booster plugin <= 1.3.8.4 - Authenticated Reflected Cross-Site Scripting (XSS) vulnerability

Vendor Gabe Livan
Product Asset CleanUp: Page Speed Booster (WordPress plugin)
Weakness CWE-79 · XSS
Published October 11, 2022
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Authenticated (admin+) Reflected Cross-Site Scripting (XSS) vulnerability in Gabe Livan's Asset CleanUp: Page Speed Booster plugin <= 1.3.8.4 at WordPress.

Explanation of Vulnerability in Simple Terms

02Summary

Asset CleanUp: Page Speed Booster versions up to 1.3.8.4 contain a stored cross-site scripting (XSS) vulnerability. An authenticated admin can inject malicious scripts that execute in other users' browsers when they view affected pages. The vulnerability requires admin privileges and user interaction to exploit, but can affect site visitors across the application.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in other users' browsers when they view the site.

Potential impact on your site

04Site Impact

A compromised admin account can inject scripts affecting all site visitors, potentially stealing credentials or redirecting users.

Conditions required to exploit

05Prerequisites

Admin-level access to the WordPress site; victim must view a page containing the injected script.

Key dates

06Disclosure timeline

October 11, 2022 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE

CVE-2026-16597 GTM4WP <= 1.22.3 - Unauthenticated Stored Cross-Site Scripting via WooCommerce Billing Fields CVE-2026-7436 WPC Badge Management for WooCommerce <= 3.1.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'text' Attribute CVE-2026-15333 Cozy Blocks <= 2.2.11 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'cozyCustomFont' Block Attribute CVE-2026-15100 Post Grid Gutenberg Blocks <= 5.0.32 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'searchnoresult' Block Attribute CVE-2026-15755 Open User Map <= 1.4.45 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes