WordPress security changelog
HIGH CVE-2026-66594 Deferred

WordPress Persistent Login permits Subscriber-level SQL injection

WordPress Persistent Login <= 3.1.0 allows a Subscriber to place crafted input into an SQL query without adequate neutralization. The CVSS vector assigns high confidentiality and low availability impact, indicating database disclosure and query disruption without a separately claimed write primitive.

CVE / CNA score 8.5 CVSS 3.1 · audit@patchstack.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
WordPress Persistent Login
Plugin slug
wp-persistent-login
Affected
n/a through 3.1.0
Safe version
3.1.1
Published
Aug 20, 2026
Weakness
CWE-89 — Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

This CVE was published Aug 20, 2026 and is one of 2 known issues for this plugin.

Update, patch or deactivate.

Update WordPress Persistent Login to 3.1.1 or later. Review activity by the stated attacker class and investigate unexpected data access, state changes, files or sessions relevant to this vulnerability class.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Technical description

Subscriber SQL Injection in WordPress Persistent Login <= 3.1.0 versions.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L

Primary and upstream sources