CVE-2021-24452: Boldgrid w3 Total Cache

Medium severity, CVSS 6.1. EPSS: 1.9% chance of exploitation in the next 30 days.

The W3 Total Cache WordPress plugin before 2.1.5 was affected by a reflected Cross-Site Scripting (XSS) issue within the "extension" parameter in the Extensions dashboard, when the 'Anonymously track usage to improve product quality' setting is enabled, as the parameter is output in a JavaScript context without proper escaping. This could allow an attacker, who can convince an authenticated admin into clicking a link, to run malicious JavaScript within the user's web browser, which could lead to full site compromise.

Affected products

• Boldgrid w3 Total Cache: before 2.1.5 (fixed in 2.1.5)

Published 2021-07-19. Last modified 2026-06-17.