CVE-2026-123474: LeapWorx Premium Blocks Gutenberg broken access control

CVE-2026-123474 · Severity: medium · CVSS 5.3 · Published 2026-11-07

Premium Blocks is a WordPress plugin that provides custom content blocks for the Gutenberg editor. An incorrectly configured access control vulnerability allows unauthenticated users to access pages and perform actions they shouldn't be allowed to perform, potentially exposing sensitive data or functionality.

Technologies: LeapWorx Premium Blocks – Gutenberg Blocks for WordPress. Vendors: LeapWorx.

Quick answers

Is CVE-2026-123474 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-123474 being exploited in the wild.
How severe is CVE-2026-123474?
Medium severity, with a CVSS score of 5.3, published 7 November 2026.
Which products and versions are affected?
LeapWorx Premium Blocks – Gutenberg Blocks for WordPress up to 2.3.18.
Is there a fix for CVE-2026-123474?
Yes: fixed in 2.3.19. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-123474 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-123474?
Check whether you run LeapWorx Premium Blocks – Gutenberg Blocks for WordPress 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.

How to fix

  • Fixed in: 2.3.19

Technical details

Broken access control in the Premium Blocks – Gutenberg Blocks for WordPress plugin (versions up to 2.3.18) permits unauthenticated attackers to bypass authorization checks via improperly enforced access restrictions. The vulnerability is remotely exploitable over the network and requires no user interaction or authentication from the attacker to trigger.

Affected products

  • LeapWorx Premium Blocks – Gutenberg Blocks for WordPress up to 2.3.18

Timeline

  • 2026-11-07: disclosed
  • 2026-11-07: patched

References

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