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 Blocksy theme for WordPress is vulnerable to Reflected Cross-Site Scripting via the custom_url parameter in all versions up to, and including, 2.0.50 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Explanation of Vulnerability in Simple Terms
Blocksy versions up to 2.0.50 contain an input validation flaw that allows authenticated users with low privileges to read sensitive data or modify site content across different security contexts. The vulnerability requires a valid user account but no special interaction. The scope extends beyond the vulnerable component, potentially affecting other parts of the site.
What an attacker can do
Read sensitive data or modify site content if they have a low-privilege user account.
Potential impact on your site
Authenticated users can access or change data they shouldn't, potentially exposing private information or altering site content.
Conditions required to exploit
Attacker must have a valid low-privilege user account; no user interaction required.
Key dates
External resources
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