🔐 CVE Alert

CVE-2025-2918

MEDIUM 6.4

Ultimate Blocks – WordPress Blocks Plugin <= 3.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple Widgets

CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th

The Ultimate Blocks – WordPress Blocks Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple widgets in all versions up to, and including, 3.3.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CWE CWE-79
Vendor ultimateblocks
Product ultimate blocks – 25+ gutenberg blocks for block editor
Published Jun 10, 2025
Last Updated Apr 8, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability

Affected Versions

ultimateblocks / Ultimate Blocks – 25+ Gutenberg Blocks for Block Editor
0 ≤ 3.3.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/41b2a4cc-fb23-41eb-b1a4-d793ae924d9a?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ultimate-blocks/tags/3.2.9/src/blocks/how-to/block.php#L335 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ultimate-blocks/tags/3.2.9/src/blocks/content-filter/block.php#L14 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ultimate-blocks/tags/3.2.9/src/blocks/tabbed-content/block.php#L136 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ultimate-blocks/tags/3.2.9/src/blocks/content-toggle/block.php#L133

Credits

Nguyen Ngoc Quang Bach