CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
What the vulnerability does
The Custom CSS, JS & PHP plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg & remove_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.3.0. 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
The Custom CSS, JS & PHP plugin for WordPress contains a stored cross-site scripting (XSS) vulnerability in versions up to 2.3.0. An attacker can inject malicious JavaScript that executes in the browsers of site visitors. The vulnerability requires user interaction—typically a victim must visit a page containing the injected code. The impact is limited to session hijacking or credential theft from affected users.
What an attacker can do
Inject malicious JavaScript that runs in visitors' browsers when they view affected pages.
Potential impact on your site
Visitor sessions and credentials can be compromised if they view pages with injected malicious scripts.
Conditions required to exploit
No authentication required. A victim must visit a page containing the attacker's injected code.
Key dates
External resources
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