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 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.
Explanation of Vulnerability in Simple Terms
Ultimate Blocks contains a cross-site scripting (XSS) vulnerability in versions up to 3.3.3. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, potentially affecting site-wide functionality. The vulnerability has scope impact, meaning it can affect components beyond the plugin itself. Update to a version newer than 3.3.3.
What an attacker can do
Inject malicious scripts that execute in other users' browsers and affect site functionality.
Potential impact on your site
Authenticated users can inject scripts affecting other visitors and site operations; may compromise user sessions or data.
Conditions required to exploit
Attacker must be logged in with low-level user privileges (e.g., contributor or subscriber).
Key dates
External resources
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