Vulnerability in Security Optimizer

CVE-2026-13342

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (28.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-13342: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Security Optimizer — versions 1.5.8

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-13342?
CVE-2026-13342 is a medium-severity vulnerability in Security Optimizer, classified under Protection Mechanism Failure. CVSS score: 5.3/10. Published 2026-08-06.
How severe is CVE-2026-13342?
Medium severity. CVSS v3 base score is 5.3 out of 10.