CVE-2026-6518 json
CMP – Coming Soon & Maintenance Plugin by NiteoThemes <= 4.1.16 - Missing Authorization to Authenticated (Administrator+) Arbitrary File Upload and Remote Code Execution
published 2026-04-18 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-23654
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 58%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.87% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- niteo CMP – Coming Soon & Maintenance Plugin by NiteoThemes
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/d6fb275b-dbba-46df-b170-977ef4a84c4c?source=cve
- plugins.trac.wordpress.org /browser/cmp-coming-soon-maintenance/tags/4.1.16/niteo-cmp.php#L1421
- plugins.trac.wordpress.org /browser/cmp-coming-soon-maintenance/tags/4.1.16/niteo-cmp.php#L1437
- plugins.trac.wordpress.org /browser/cmp-coming-soon-maintenance/tags/4.1.16/niteo-cmp.php#L1447
- plugins.trac.wordpress.org /changeset?old_path=%2Fcmp-coming-soon-maintenance/tags/4.1.16&new_path=%2Fcmp-coming-soon-maintenance/tags/4.
Sources
- CVE List CVE-2026-6518
- NVD CVE-2026-6518
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.