CMP – Coming Soon & Maintenance Plugin by NiteoThemes <= 4.1.16 — Missing Authorization to Authenticated (Administrator+) Arbitrary File Upload and Remote Code Execution
CVE-2026-6518Published · Updated Action summary
Affected: ≤4.1.16Update to 4.1.17 or newer
All remediation steps- Severity
- High8.8
- CVSS
- 8.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-434 Arbitrary File Upload
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
CMP – Coming Soon & Maintenance Plugin by NiteoThemes cmp-coming-soon-maintenance
- Affected≤ 4.1.16
- Patched in4.1.17
Update to 4.1.17 or newer.
You are affected if you run ≤ 4.1.16. Version 4.1.17 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under CMP – Coming Soon & Maintenance Plugin by NiteoThemes.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 4.1.17, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch CMP – Coming Soon & Maintenance Plugin by NiteoThemes to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Bao Le.
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.
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 CMP – Coming Soon & Maintenance Plugin by NiteoThemes
All 13| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | 4.1.20 - Missing Authorization to Unauthenticated Maintenance Mode Bypass 4.1.19 – 4.1.20Update to 4.1.21 | CVE-2026-101138 | |
| Medium5.3 | Coming Soon & Maintenance <= 4.1.19 - Unauthenticated Maintenance Mode Bypass ≤4.1.19Update to 4.1.20 | CVE-2026-13413 | |
| High7.2 | Authenticated (Editor+) Privilege Escalation via Arbitrary Option Update to cmp_ajax_import_settings AJAX Action ≤4.1.17Update to 4.1.18 | CVE-2026-12470 | |
| Medium4.7 | Authenticated (Editor+) Privilege Escalation <4.1.18Update to 4.1.18 | CVE-2026-13415 | |
| Medium5.3 | Missing Authorization to Unauthenticated Settings Change <4.1.18Update to 4.1.18 | CVE-2026-13414 |
- Medium5.34.1.20 - Missing Authorization to Unauthenticated Maintenance Mode Bypass
4.1.19 – 4.1.20Update to 4.1.21
- Medium5.3Coming Soon & Maintenance <= 4.1.19 - Unauthenticated Maintenance Mode Bypass
≤4.1.19Update to 4.1.20
- High7.2Authenticated (Editor+) Privilege Escalation via Arbitrary Option Update to cmp_ajax_import_settings AJAX Action
≤4.1.17Update to 4.1.18
- Medium4.7Authenticated (Editor+) Privilege Escalation
<4.1.18Update to 4.1.18
- Medium5.3Missing Authorization to Unauthenticated Settings Change
<4.1.18Update to 4.1.18
Same weakness (Arbitrary File Upload)
All Arbitrary File Upload| 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 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity high, CVSS 8.8
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.