Spectra – WordPress Gutenberg Blocks <= 2.3.1 - HTML Injection in Emails

Improper Input Validation
CVE CVE-2023-23735
CVSS 6.5 (Medium)
Publicly Published January 23, 2023
Last Updated February 3, 2023
Researcher Dave Jong - Patchstack


The Spectra – WordPress Gutenberg Blocks plugin for WordPress is vulnerable to HTML injection via Email in versions up to, and including, 2.3.1. This is due to insufficient input validation and output escaping of content being sent via email. This makes it possible for unauthenticated attackers to send emails to unsuspecting victims with content containing HTML.



Vulnerability Details for Spectra – WordPress Gutenberg Blocks

Software Type Plugin
Software Slug ultimate-addons-for-gutenberg (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.3.2, or a newer patched version
Affected Version
  • <= 2.3.1
Patched Version
  • 2.3.2

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