Security Optimizer – The All-In-One Protection Plugin < 1.6.5 - Login Access IP Allowlist Bypass via post_password
Priority MEDIUM 63CWE-693Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-693.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00347 28th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Security Optimizer (Unknown): 1.6.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Security Optimizer | 1.5.8 to before 1.6.5 | 1.6.5 | Patch available | CNA |
- Security Optimizer VendorUnknown Affected 1.5.8 to before 1.6.5 Fixed in 1.6.5 Patch available CNA
Remediation
- Fix · CNA Security Optimizer (Unknown) Fixed in 1.6.5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13342
- 2026-10-03 Alias added: GHSA-hxv9-fx39-qg4c
References
Sources
- CVE-2026-13342 · CVE Program
- CVE-2026-13342 · NVD
- FIRST EPSS
- GHSA-hxv9-fx39-qg4c · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences