CVE-2026-17011

Nexter Blocks < 5.0.2 - Contributor+ Stored CSS Injection

Published Aug 9, 2026 CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions nexter Blocks
Vendors & Products Wordpress-extensions
Wordpress-extensions nexter Blocks
Type Values Removed Values Added
Weaknesses CWE-345
Metrics cvssV3_1

{'score': 3.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-784
Type Values Removed Values Added
Description 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.
Title Nexter Blocks < 5.0.2 - Contributor+ Stored CSS Injection
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 11, 2026, 7:47 PM
Reserved
Jul 24, 2026, 10:10 AM
Status
Deferred
Published
Aug 9, 2026, 6:18 AM
Modified
Aug 26, 2026, 4:31 PM