MainWP Child < 3.4.5 — Authentication Bypass
f83f878d-b708-4677-929a-e1ced535d99fPublished · Updated Action summary
Affected: <3.4.5Update to 3.4.5 or newer
All remediation steps- Severity
- High8.3
- CVSS
- 8.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:LWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:LAvailability- Low
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
MainWP Child – Securely Connects to the MainWP Dashboard to Manage Multiple Sites mainwp-child
- Affected< 3.4.5
- Patched in3.4.5
Update to 3.4.5 or newer.
You are affected if you run < 3.4.5. Version 3.4.5 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under MainWP Child – Securely Connects to the MainWP Dashboard to Manage Multiple Sites.
- 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 3.4.5, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch MainWP Child – Securely Connects to the MainWP Dashboard to Manage Multiple Sites to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Slavco Mihajloski.
The MainWP Child plugin for WordPress is vulnerable to authentication bypass due to insufficient validation on the check_login function in versions up to, and including, 3.4.4. This makes it possible for attackers to become administrative users and take full control of the affected website.
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 MainWP Child – Securely Connects to the MainWP Dashboard to Manage Multiple Sites
All 9| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High8.1 | Unauthenticated PHP Object Injection ≤6.2.1Update to 6.2.2 | CVE-2026-105436 | |
| Medium5.3 | Missing Authorization ≤6.1.1Update to 6.1.2 | CVE-2026-27366 | |
| High8.1 | Missing Authorization to Unauthenticated Privilege Escalation ≤5.3.3Update to 5.3.4 | CVE-2024-10783 | |
| Medium5.9 | Information Disclosure via Back-Up Files ≤4.4.1.1Update to 4.4.1.2 | CVE-2023-3132 | |
| High7.2 | SQL Injection via orderby, order Parameters <4.1.8Update to 4.1.8 | CVE-2021-24877 |
- High8.1Unauthenticated PHP Object Injection
≤6.2.1Update to 6.2.2
- Medium5.3Missing Authorization
≤6.1.1Update to 6.1.2
- High8.1Missing Authorization to Unauthenticated Privilege Escalation
≤5.3.3Update to 5.3.4
- Medium5.9Information Disclosure via Back-Up Files
≤4.4.1.1Update to 4.4.1.2
- High7.2SQL Injection via orderby, order Parameters
<4.1.8Update to 4.1.8
Timeline
CVE published
Severity high, CVSS 8.3
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.