CVE-2026-13342 Security Optimizer – The All-In-One Protection Plugin < 1.6.5 - Login Access IP Allowlist Bypass via post_password
Attackers can bypass IP-based login restrictions in the Security Optimizer WordPress plugin to access the login form from unauthorized IPs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13342?
CVE-2026-13342 is a medium-severity authentication bypass vulnerability in Unknown Security Optimizer, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Security Optimizer WordPress plugin from 1.5.8 to 1.6.4 does not correctly validate requests to its optional IP-based login restriction feature, allowing the restriction to be bypassed so that unauthenticated requests from non-allowlisted IP addresses can reach and use the login form, defeating the access control the administrator configured.
Weakness: CWE-693
Which versions are affected by CVE-2026-13342?
How do I fix CVE-2026-13342?
No fix has been published for CVE-2026-13342 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-13342 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13342 exists.
Sources
Also known as GHSA-hxv9-fx39-qg4c.