LWS Optimize – All-in-One Speed Booster & Cache Tools: Filesystem traversal
LWS Optimize – All-in-One Speed Booster & Cache Tools is affected by filesystem traversal. Exploitation requires at least editor-level access. A crafted path can escape the intended directory and reach files or directories elsewhere on the server. The published affected range is <= 3.3.19.
- Component
- LWS Optimize – All-in-One Speed Booster & Cache Tools
- Plugin slug
lws-optimize- Affected
- <= 3.3.19
- Safe version
> 3.3.19- Published
- Jun 13, 2026
This CVE was published Jun 13, 2026 and is one of 2 known issues for this plugin.
Update, patch or deactivate.
Update LWS Optimize – All-in-One Speed Booster & Cache Tools to a release after 3.3.19, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical 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 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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N