WP Maintenance Mode & Site Under Construction <= 1.8.2 — Cross-Site Request Forgery to Arbitrary Plugin Installation/Activation
b4d33e69-3620-42d9-adb3-267a5ed02a58Published · Updated Action summary
Affected: ≤1.8.2Update to 1.9 or newer
All remediation steps- Severity
- High8.8
- CVSS
- 8.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-352 CSRF
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
WP Maintenance Mode & Site Under Construction wp-maintenance-mode-site-under-construction
- Affected≤ 1.8.2
- Patched in1.9
Update to 1.9 or newer.
You are affected if you run ≤ 1.8.2. Version 1.9 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WP Maintenance Mode & Site Under Construction.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 1.9, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch WP Maintenance Mode & Site Under Construction to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to WPScanTeam.
WP Maintenance Mode & Site Under Construction Plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.8.2. This is due to missing or incorrect nonce validation on the 'cp_plugins_do_button_job_later_callback' AJAX action. This makes it possible for unauthenticated attackers to install and activate other plugins via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
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 WP Maintenance Mode & Site Under Construction
All 5| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Cross-Site Request Forgery ≤4.3Update to 4.4 | CVE-2025-49284 | |
| High8.8 | Cross-Site Request Forgery to Arbitrary Plugin Installation/Activation ≤1.5.2Update to 1.6 | — | |
| High8.8 | Improper Authorization <1.5.2Update to 1.5.2 | CVE-2021-24190 | |
| High8.8 | Missing Authorization to Arbitrary Plugin Installation/Activation <1.8.2Update to 1.8.2 | CVE-2021-24191 |
- Medium4.3Cross-Site Request Forgery
≤4.3Update to 4.4
- High8.8Cross-Site Request Forgery to Arbitrary Plugin Installation/Activation
≤1.5.2Update to 1.6
- High8.8Improper Authorization
<1.5.2Update to 1.5.2
- High8.8Missing Authorization to Arbitrary Plugin Installation/Activation
<1.8.2Update to 1.8.2
Same weakness (CSRF)
All CSRF| 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
- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- 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.