# CVE-2026-6518

> Vulnerability · severity: **HIGH** (CVSS 8.8).

## Description

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.

## Key facts

- **CVE ID:** CVE-2026-6518
- **Published:** 2026-04-18
- **CVSS severity:** HIGH
- **CVSS base score:** 8.8
- **CWE codes:** CWE-434

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6518

## Citation

> AI Analytics. CVE-2026-6518. Retrieved 2026-08-10 from https://api.ai-analytics.org/cve/CVE-2026-6518. Derived from NIST NVD. Licensed CC0.

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