Security Optimizer – The All-In-One Protection <= 1.6.4 - IP Allowlist Bypass

5.3
Use of Less Trusted Source
CVE CVE-2026-13342
CVSS 5.3 (Medium)
Publicly Published July 23, 2026
Last Updated August 17, 2026
Researcher Shivamani Vastrala

Description

The Security Optimizer – The All-In-One Protection Plugin plugin for WordPress is vulnerable to IP Allowlist Bypass in all versions up to, and including, 1.6.4. This makes it possible for unauthenticated attackers to bypass IP based restrictions.

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Vulnerability Details for Security Optimizer – The All-In-One Protection Plugin

Software Type Plugin
Software Slug sg-security (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.6.5, or a newer patched version
Affected Version
  • <= 1.6.4
Patched Version
  • 1.6.5

Recent vulnerabilities in Security Optimizer – The All-In-One Protection Plugin

# Title CVE ID CVSS Researchers Date
1 Security Optimizer – The All-In-One Protection Plugin <= 1.6.6 - 2-Factor Authentication Bypass CVE-2026-82228 5.3 Ananda Dhakal August 28, 2026
2 SiteGround Security <= 1.5.8 - Missing Authorization CVE-2025-66121 5.3 Legion Hunter November 30, 2025
3 Security Optimizer – The All-In-One Protection Plugin <= 1.5.0 - Missing Authorization via hide_notice() CVE-2024-38774 4.3 Rafie Muhammad July 19, 2024
4 SiteGround Security <= 1.3.0 - Authenticated (Administrator+) SQL Injection CVE-2023-0234 7.2 So Sakaguchi January 13, 2023
5 SiteGround Security <= 1.2.5 - Authorization Weakness to Authentication Bypass CVE-2022-0993 8.1 Chloe Chamberland April 7, 2022
6 SiteGround Security <= 1.2.5 - Authentication Bypass via 2FA Setup CVE-2022-0992 9.8 Chloe Chamberland April 6, 2022

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