CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
What the vulnerability does
The Spectra Gutenberg Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Custom CSS in all versions up to, and including, 2.19.14 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.
Explanation of Vulnerability in Simple Terms
Spectra Gutenberg Blocks versions up to 2.19.14 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 affected content. Site administrators should update to a version newer than 2.19.14 to remediate this issue.
What an attacker can do
Inject malicious JavaScript that executes in other users' browsers when they view affected pages.
Potential impact on your site
Compromised user accounts, stolen session tokens, or malware distribution to site visitors.
Conditions required to exploit
Attacker must have a WordPress user account with permission to edit blocks or pages.
Key dates
External resources
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