CVE-2026-12089
Received Received - Intake
Arbitrary File Read in LWS Optimize WordPress Plugin

Publication date: 2026-06-13

Last updated on: 2026-06-13

Assigner: Wordfence

Description
The LWS Optimize – All-in-One Speed Booster & Cache Tools plugin for WordPress is vulnerable to Arbitrary File Read in versions up to, and including, 3.3.19. This is due to the combine_current_css() function trusting <link rel="stylesheet" href="..."> values harvested from page HTML and converting same-site URLs to absolute filesystem paths before reading them with file_get_contents()/Minify\CSS::add(), without enforcing that the resolved path stay within ABSPATH or have a .css extension. This makes it possible for authenticated attackers, with Editor-level access and above, to read arbitrary files.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-06-13
Last Modified
2026-06-13
Generated
2026-06-13
AI Q&A
2026-06-13
EPSS Evaluated
N/A
NVD
CVE-2026-12089
EUVD
EUVD-2026-36635
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
lwsthemes lws_optimize to 3.3.19 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

The LWS Optimize – All-in-One Speed Booster & Cache Tools plugin for WordPress has a vulnerability called Arbitrary File Read in versions up to and including 3.3.19.

This vulnerability arises because the combine_current_css() function trusts stylesheet link href values taken from page HTML and converts same-site URLs to absolute filesystem paths before reading them.

However, it does not enforce that the resolved path remains within the WordPress root directory (ABSPATH) or that the file has a .css extension.

As a result, authenticated attackers with Editor-level access or higher can read arbitrary files on the server.

Impact Analysis

This vulnerability allows attackers with Editor-level access or above to read arbitrary files on the server.

Such unauthorized file access can lead to exposure of sensitive information, including configuration files, credentials, or other private data stored on the server.

The CVSS score of 4.9 indicates a moderate severity with high confidentiality impact but no impact on integrity or availability.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-12089. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart