CVE-2026-17011: Nexter Blocks < 5.0.2 - Contributor+ Stored CSS Injection

Published Aug 9, 2026
·
Updated

The Nexter Blocks WordPress plugin before 5.0.2 does not restrict who can save global CSS through one of its REST endpoints, allowing users with at least the Contributor role to store arbitrary CSS that is rendered site-wide on the front end, enabling defacement, content hiding, and UI redressing.

Affected Software

1 affected component
Nexter Blocks WordPress plugin<5.0.2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade wordpress/Nexter Blocks to a version that resolves this vulnerability.

    Fixed in 5.0.2

Event History

Aug 9, 2026
CVE Published
via MITRE·06:00 AM
Data Sourced
via MITRE·06:00 AM
DescriptionWeakness
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