The CMP – Coming Soon & Maintenance Plugin by NiteoThemes plugin for WordPress is vulnerable to arbitrary file upload and remote code execution in all versions up to, and including, 4.1.16 via the `cmp_theme_update_install` AJAX action. This is due to the function only checking for the `publish_pages` capability (available to Editors and above) instead of `manage_options` (Administrators only), combined with a lack of proper validation on the user-supplied file URL and no verification of the downloaded file's content before extraction. This makes it possible for authenticated attackers, with Administrator-level access and above, to force the server to download and extract a malicious ZIP file from a remote attacker-controlled URL into a web-accessible directory (`wp-content/plugins/cmp-premium-themes/`), resulting in remote code execution. Due to the lack of a nonce for Editors, they are unable to exploit this vulnerability.
CVE-2026-6518 is a high severity with CVSS 8.8 Remote Code Execution issue affecting the Plugin CMP – Coming Soon & Maintenance Plugin by NiteoThemes. It affects Versions up to 4.1.16 and is fixed in 4.1.17.
CVE-2026-6518 is tracked for the Plugin CMP – Coming Soon & Maintenance Plugin by NiteoThemes as high severity with CVSS 8.8. The affected range is Versions up to 4.1.16. Update CMP – Coming Soon & Maintenance Plugin by NiteoThemes to 4.1.17 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
cmp-coming-soon-maintenance
View on wordpress.org
|
| CVE | CVE-2026-6518 |
| Patched Versions |
4.1.17
|
| Affected Versions |
Versions up to 4.1.16
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
CMP <= 3.8.1 - Missing Authorization
CMP – Coming Soon & Maintenance <= 4.1.13 - Authenticated (Admin+) Arbitrary File Upload
CMP – Coming Soon & Maintenance <= 4.1.10 - Authenticated (Admin+) Server-Side Request Forgery
CMP – Coming Soon & Maintenance <= 4.1.7 - Maintenance Mode Bypass
CMP – Coming Soon & Maintenance Plugin by NiteoThemes <= 4.1.6 - Information Exposure
CMP - Coming Soon & Maintenance Plugin <= 4.0.18 - Unauthenticated Arbitrary CSS Update
This record contains material that is subject to copyright
License: Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy. Read more
License: CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy. Read more
