W3 Total Cache <= 2.1.3 - Reflected Cross-Site Scripting via extension

6.1
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2021-24436
CVSS 6.1 (Medium)
Publicly Published June 28, 2021
Last Updated January 18, 2023
Researcher renniepak - renniepak

Description

The W3 Total Cache WordPress plugin before 2.1.4 was vulnerable to a reflected Cross-Site Scripting (XSS) security vulnerability within the "extension" parameter in the Extensions dashboard, which is output in an attribute without being escaped first. 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.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

Share

Vulnerability Details for W3 Total Cache

Software Type Plugin
Software Slug w3-total-cache (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.1.4, or a newer patched version
Affected Version
  • < 2.1.4
Patched Version
  • 2.1.4

Recent vulnerabilities in W3 Total Cache

# Title CVE ID CVSS Researchers Date
1 W3 Total Cache <= 2.10.6 - Unauthenticated Stored Cross-Site Scripting via Comment Content CVE-2026-87920 7.2 theviper17y October 1, 2026
2 W3 Total Cache <= 2.10.5 - Unauthenticated Stored Cross-Site Scripting via LazyLoad Background Mutator CVE-2026-78438 7.2 theviper17y September 4, 2026
3 W3 Total Cache < 2.10.5 - Unauthenticated Path Traversal CVE-2026-18051 7.5 Jakub Herman August 21, 2026
4 W3 Total Cache <= 2.10.3 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name CVE-2026-18109 7.2 daroo August 13, 2026
5 W3 Total Cache <= 2.10.2 - Unauthenticated Path Traversal CVE-2026-66695 5.3 Mykel Nelson July 31, 2026
6 W3 Total Cache <= 2.9.4 - Unauthenticated Arbitrary File Read via 'f_array[]' Parameter CVE-2026-9282 7.5 snr July 10, 2026
7 W3 Total Cache <= 2.9.4 - Unauthenticated Arbitrary Code Execution CVE-2026-57623 8.1 Ananda Dhakal June 29, 2026
8 W3 Total Cache <= 2.9.3 - Unauthenticated Security Token Exposure via User-Agent Header CVE-2026-5032 7.5 wesley (wcraft) April 1, 2026
9 W3 Total Cache <= 2.9.1 - Missing Authorization CVE-2026-39595 4.3 Muhammad Sharief March 12, 2026
10 W3 Total Cache <= 2.9.1 - Unauthenticated Arbitrary Code Execution CVE-2026-27384 9.8 CODE WHITE GmbH February 24, 2026

Did you know Wordfence Intelligence provides free personal and commercial API access to our comprehensive WordPress vulnerability database, along with a free webhook integration to stay on top of the latest vulnerabilities added and updated in the database? Get started today!

Learn more

Want to get notified of the latest vulnerabilities that may affect your WordPress site?
Install Wordfence on your site today to get notified immediately if your site is affected by a vulnerability that has been added to our database.

Get Wordfence

The Wordfence Intelligence WordPress vulnerability database is completely free to access and query via API. Please review the documentation on how to access and consume the vulnerability data via API.

Documentation