CVE-2026-66630: PublishPress Series SQL Injection in administrator panel

CVE-2026-66630 · Severity: high · CVSS 7.6 · Published 2026-09-17

PublishPress Series is a WordPress plugin used to organize and manage content series. An administrator-level SQL injection vulnerability allows authenticated admins to read, modify, or delete the entire database including user accounts and sensitive data, potentially compromising the entire WordPress installation.

Technologies: PublishPress Series. Vendors: PublishPress.

Quick answers

Is CVE-2026-66630 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-66630 being exploited in the wild.
How severe is CVE-2026-66630?
High severity, with a CVSS score of 7.6, published 17 September 2026.
Which products and versions are affected?
PublishPress Series <=3.1.3.
Is there a fix for CVE-2026-66630?
A patch was published on 2026-09-17: Version 3.1.4 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-66630 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-66630?
Check whether you run PublishPress Series 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

PublishPress Series plugin versions 3.1.3 and earlier contain an SQL injection vulnerability in the administrator panel. The flaw is rooted in improper input validation/parameterization of database queries. Attack requires administrator privileges to trigger, limiting the attack surface to authenticated admin users. A successful exploit allows complete database access including reading sensitive data, modifying records, or deleting content. The vulnerability is patched in version 3.1.4 and later.

Affected products

  • PublishPress Series <=3.1.3

Timeline

  • 2026-09-17: disclosed: Published by Patchstack
  • 2026-09-17: patched: Version 3.1.4 released

References

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