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 WordPress Captcha Plugin by Captcha Bank plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 4.0.36. 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 WordPress Captcha Plugin by Captcha Bank versions 4.0.36 and earlier contain a cross-site scripting (XSS) vulnerability. An attacker can inject malicious scripts that execute in users' browsers when they interact with the plugin. The vulnerability requires user interaction and affects the site's integrity and confidentiality. Site owners should update to a version newer than 4.0.36.
What an attacker can do
Inject malicious scripts that run in visitors' browsers, stealing data or performing actions on their behalf.
Potential impact on your site
Visitor accounts and data at risk; site reputation damaged if used for phishing or malware distribution.
Conditions required to exploit
Visitor must interact with a page containing the vulnerable plugin (no authentication required).
Key dates
External resources
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