Security Optimizer – The All-In-One Protection Plugin <= 1.6.6 — 2-Factor Authentication Bypass
CVE-2026-82228Published · Updated Action summary
Affected: ≤1.6.6Update to 1.6.7 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-287 Improper Authentication
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Security Optimizer – The All-In-One Protection Plugin sg-security
- Affected≤ 1.6.6
- Patched in1.6.7
Update to 1.6.7 or newer.
You are affected if you run ≤ 1.6.6. Version 1.6.7 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Security Optimizer – The All-In-One Protection Plugin.
- 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 1.6.7, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Security Optimizer – The All-In-One Protection Plugin to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Ananda Dhakal.
The Security Optimizer – The All-In-One Protection Plugin plugin for WordPress is vulnerable to 2FA Bypass in all versions up to, and including, 1.6.6. This makes it possible for unauthenticated attackers to bypass a second factor of authentication when the first is known.
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 Security Optimizer – The All-In-One Protection Plugin
All 8| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Two-Factor Authentication via Brute Force ≤1.6.8Update to 1.6.9 | CVE-2026-118185 | |
| Medium5.3 | IP Allowlist Bypass ≤1.6.4Update to 1.6.5 | CVE-2026-13342 | |
| Medium5.3 | Missing Authorization ≤1.5.8Update to 1.5.9 | CVE-2025-66121 | |
| Medium4.3 | Missing Authorization via hide_notice() ≤1.5.0Update to 1.5.1 | CVE-2024-38774 | |
| High7.2 | Authenticated (Administrator+) SQL Injection ≤1.3.0Update to 1.3.1 | CVE-2023-0234 |
- Medium4.3Two-Factor Authentication via Brute Force
≤1.6.8Update to 1.6.9
- Medium5.3IP Allowlist Bypass
≤1.6.4Update to 1.6.5
- Medium5.3Missing Authorization
≤1.5.8Update to 1.5.9
- Medium4.3Missing Authorization via hide_notice()
≤1.5.0Update to 1.5.1
- High7.2Authenticated (Administrator+) SQL Injection
≤1.3.0Update to 1.3.1
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. 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.