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 BlockArt Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'clientId' block attribute in all versions up to, and including, 2.2.15. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-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
BlockArt Blocks contains a cross-site scripting (XSS) vulnerability in versions up to 2.2.15. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, including site administrators. The vulnerability has scope change, meaning the impact extends beyond the plugin itself to affect the broader WordPress environment.
What an attacker can do
Inject malicious JavaScript that runs in other users' browsers, including administrators.
Potential impact on your site
Compromised admin accounts, stolen session tokens, or malicious content injected into the site for all visitors.
Conditions required to exploit
Attacker must be logged in with at least low-level WordPress privileges (e.g., contributor or editor role).
Key dates
External resources
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