CVE-2026-27384 CRITICAL

CVE-2026-27384: WordPress W3 Total Cache plugin <= 2.9.1 - Arbitrary Code Execution vulnerability

Vendor Boldgrid
Product W3 Total Cache
Weakness CWE-1284
Published March 5, 2026
Last update April 29, 2026
View on NVD All CVEs

CVSS base score

9.0/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Improper Validation of Specified Quantity in Input vulnerability in BoldGrid W3 Total Cache w3-total-cache allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects W3 Total Cache: from n/a through <= 2.9.1.

Explanation of Vulnerability in Simple Terms

02Summary

W3 Total Cache versions up to 2.9.1 contain a vulnerability that allows an attacker to read sensitive data, modify site content, or disrupt service availability. The attack requires network access and high technical complexity but does not require authentication or user interaction. The vulnerability affects the broader system beyond the plugin itself.

What an attacker can do

03Attacker Capabilities

Read sensitive data, modify site content, or cause the site to become unavailable.

Potential impact on your site

04Site Impact

Site data could be exposed, content altered, or service disrupted without warning or user action.

Conditions required to exploit

05Prerequisites

Network access and high technical skill; no authentication or user interaction required.

Key dates

06Disclosure timeline

March 5, 2026 CVE published
April 29, 2026 Record updated