WS Optimize – All-in-One Speed Booster & Cache Tools <= 3.3.19 — Authenticated (Editor+) Arbitrary File Read
CVE-2026-12089Published · Updated Action summary
Affected: ≤3.3.19Update to 3.3.20 or newer
All remediation steps- Severity
- Medium4.9
- CVSS
- 4.9CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:HPrivileges required- High
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:NIntegrity- None
A:NAvailability- None
- Weakness
- CWE-22 Path Traversal
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
LWS Optimize – All-in-One Speed Booster & Cache Tools lws-optimize
- Affected≤ 3.3.19
- Patched in3.3.20
Update to 3.3.20 or newer.
You are affected if you run ≤ 3.3.19. Version 3.3.20 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under LWS Optimize – All-in-One Speed Booster & Cache Tools.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 3.3.20, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch LWS Optimize – All-in-One Speed Booster & Cache Tools to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Omar Elshopky (3l5h0pky).
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in LWS Optimize – All-in-One Speed Booster & Cache Tools
All 5| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤4.1.1Update to 4.1.2 | CVE-2026-16032 | |
| Medium4.3 | Missing Authorization <3.4Update to 3.4 | CVE-2026-16042 | |
| Medium4.3 | Cross-Site Request Forgery ≤1.9.1Update to 2.0 | CVE-2024-30541 | |
| High8.8 | Missing Authorization Checks ≤2.1Update to 2.1.5 | — |
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Same weakness (Path Traversal)
All Path Traversal| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
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Timeline
CVE published
Severity medium, CVSS 4.9
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.