What the vulnerability does
01Description
The Spectra – WordPress Gutenberg Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's Image Gallery block in all versions up to, and including, 2.12.8 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Explanation of Vulnerability in Simple Terms
02Summary
Spectra Gutenberg Blocks versions up to 2.12.8 contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts. The vulnerability affects the block editor and can impact other users viewing the site. Site administrators should update to a version newer than 2.12.8 to remediate this issue.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers when they view affected pages.
Potential impact on your site
04Site Impact
Compromised user accounts or malicious content injected into pages viewed by site visitors.
Conditions required to exploit
05Prerequisites
Attacker must have a WordPress user account with permission to edit blocks or pages.
Key dates
06Disclosure timeline
May 23, 2024
CVE published
April 8, 2026
Record updated
