Security Optimizer Plugin Security Flaw Exposes Login Interface
CVE-2026-13342

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Security Optimizer
Vendor
CVE Published:
6 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13342?

The Security Optimizer WordPress plugin, versions 1.5.8 through 1.6.4, has a critical security flaw that allows bypassing the IP-based login restriction feature. This vulnerability occurs due to improper validation of requests, enabling unauthenticated users from non-allowlisted IPs to access the login form. This undermines the intended access controls set by administrators, making it essential for users to update the plugin to mitigate potential security risks.

Affected Version(s)

Security Optimizer 1.5.8 < 1.6.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-13342 - Proof of Concept

References

https://wpscan.com/vulnerability/ab14b11c-96ab-4d07-89e0-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Shivamani Vastrala
WPScan
.