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 Shield Security plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'message' parameter in all versions up to, and including, 21.0.8 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
Shield contains a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into pages viewed by other users. The vulnerability requires user interaction—typically clicking a malicious link—and can affect the confidentiality and integrity of user data. Sites running Shield version 21.0.8 or earlier are affected.
What an attacker can do
Inject malicious scripts that execute in other users' browsers, potentially stealing session tokens or modifying page content.
Potential impact on your site
Users' accounts and data could be compromised if they interact with attacker-crafted links while logged in.
Conditions required to exploit
No authentication required. Victim must click a malicious link or visit an attacker-controlled page.
Key dates
External resources
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