WS Optimize – All-in-One Speed Booster & Cache Tools <= 3.3.19 - Authenticated (Editor+) Arbitrary File Read
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| aurelienlws | LWS Optimize – All-in-One Speed Booster & Cache Tools | up to 3.3.19 | — | No fix listed | CNA |
- LWS Optimize – All-in-One Speed Booster & Cache Tools Vendoraurelienlws Affected up to 3.3.19 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-12089
- 2026-10-03 Alias added: GHSA-cx9x-fm2c-c65m
References
Other 3
- 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
More aurelienlws vulnerabilities
- TI-2025-07852 LWS Cleaner <= 2.4.1.3 - Authenticated (Administrator+) Arbitrary File Deletion via 'lws_cl_delete_file' CVSS 3.1HIGH 7.2
- TI-2025-07452 Improper authorization in aurelienlws LWSCache CVSS 3.1MEDIUM 4.3
Sources
- CVE-2026-12089 · CVE Program
- CVE-2026-12089 · NVD
- FIRST EPSS
- GHSA-cx9x-fm2c-c65m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences