SQL Injection Vulnerability in WordPress Persistent Login by WordPress
CVE-2026-66594

8.5HIGH

Key Information:

Vendor

WordPress
Status
WordPress Persistent Login
Vendor
CVE Published:
20 August 2026

What is CVE-2026-66594?

A SQL Injection vulnerability exists in the Persistent Login plugin for WordPress versions 3.1.0 and below. This flaw allows unauthenticated attackers to manipulate SQL queries, potentially leading to unauthorized access to sensitive user data. The exploitation of this vulnerability can compromise the integrity of the website by enabling attackers to execute arbitrary SQL code, thus posing significant risks to user privacy and data security. Website administrators are advised to update their plugins to mitigate these risks.

Affected Version(s)

WordPress Persistent Login <= 3.1.0

References

https://patchstack.com/database/wordpress/plugin/wp-persi...
vdb-entry

CVSS V3.1

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

dutafi | Patchstack Bug Bounty Program
.