Is CVE-2026-66594 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-66594 being exploited in the wild.

How severe is CVE-2026-66594?

High severity, with a CVSS score of 8.5, published 20 August 2026.

Which products and versions are affected?

WordPress.org Persistent Login <= 3.1.0.

Is there a fix for CVE-2026-66594?

A patch was published on 2026-08-19: Fixed in version 3.1.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-66594 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-66594?

Check whether you run WordPress.org Persistent Login at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-66594: WordPress Persistent Login SQL injection in subscriber role

Q: Is there a fix for CVE-2026-66594?

A patch was published on 2026-08-19: Fixed in version 3.1.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-66594 attacked?

It is attacked over the network, in a web application.

Q: Am I affected by CVE-2026-66594?

Check whether you run WordPress.org Persistent Login at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-66594 · Severity: high · CVSS 8.5 · Published 2026-08-20

WordPress Persistent Login is a plugin that allows users to remain logged in across sessions. A SQL injection vulnerability in versions 3.1.0 and earlier allows authenticated users with subscriber-level privileges to execute arbitrary database queries, potentially exposing, modifying, or deleting sensitive site data including user accounts and private information.

Vendors: WordPress.org.

Quick answers

Is CVE-2026-66594 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-66594 being exploited in the wild.
How severe is CVE-2026-66594?: High severity, with a CVSS score of 8.5, published 20 August 2026.
Which products and versions are affected?: WordPress.org Persistent Login <= 3.1.0.
Is there a fix for CVE-2026-66594?: A patch was published on 2026-08-19: Fixed in version 3.1.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-66594 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-66594?: Check whether you run WordPress.org Persistent Login at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A SQL injection vulnerability exists in WordPress Persistent Login plugin versions 3.1.0 and earlier, exploitable by unauthenticated attackers or low-privilege subscribers. The vulnerability stems from insufficient input sanitization in a database query parameter, allowing direct SQL code injection. An attacker with subscriber-level access can craft malicious requests to read, modify, or delete arbitrary database records, including user credentials and sensitive post/page content. The vulnerability was patched in version 3.1.1; administrators should update immediately or apply mitigation rules to block attack patterns.

Affected products

WordPress.org Persistent Login <= 3.1.0

Timeline

2026-08-20: disclosed: CVE-2026-66594 published
2026-08-19: patched: Fixed in version 3.1.1

References

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