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 CM CSS Columns plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tag' shortcode attribute in all versions up to, and including, 1.2.1 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
CM CSS Columns versions up to 1.2.1 contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts. The vulnerability has a changed scope, meaning injected code can affect other users and site functionality. An attacker with low-level account access can craft malicious input that executes in other users' browsers, potentially compromising site security and user data.
What an attacker can do
Inject JavaScript code that runs in other users' browsers and affects site functionality.
Potential impact on your site
Authenticated users with low privileges can inject malicious scripts affecting other users and site operations.
Conditions required to exploit
Attacker must have a low-privilege account on the site; no user interaction required.
Key dates
External resources
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