CVE-2026-12089
WS Optimize – All-in-One Speed Booster & Cache Tools <= 3.3.19 - Authenticated (Editor+) Arbitrary File Read
- State
- Published
- Severity
- 4.9 Medium
- Published
- Jun 13, 2026
- Updated
- Jun 15, 2026
- Reserved
- Jun 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.9 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N | Wordfence |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
LWS Optimize – All-in-One Speed Booster & Cache Toolsaurelienlws |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5cb80db2-753c-40fa-aee4-7d8c1749d037?source=cve
- https://plugins.trac.wordpress.org/browser/lws-optimize/tags/3.3.19/Classes/Front/LwsOptimizeCSSManager.php#L289
- https://plugins.trac.wordpress.org/browser/lws-optimize/tags/3.3.19/Classes/Front/LwsOptimizeCSSManager.php#L61
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