CVE-2026-12089 Details
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.
A vulnerability allowing arbitrary file read has been identified in the LWS Optimize – All-in-One Speed Booster & Cache Tools plugin for WordPress, affecting versions through 3.3.19. The issue arises in the combine_current_css() function, which improperly trusts <link rel="stylesheet" href="..."> values from the page HTML. It converts same-site URLs to absolute filesystem paths and reads them with file_get_contents() or Minify\CSS::add(), without ensuring that the resolved path remains within ABSPATH or has a .css extension. This flaw enables authenticated attackers with Editor-level access and above to read arbitrary files.
Users are advised to update the LWS Optimize – All-in-One Speed Booster & Cache Tools plugin to version 3.3.20 or a newer patched version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 13, 2026CISA-ADP
Assessed Jun 15, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| LWS Optimize | <= 3.3.19 (semver) |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 13, 2026 | New CVE Received | [email protected] |