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 Passster plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's content_protector shortcode in all versions up to, and including, 4.2.6.4 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
Passster versions up to 4.2.6.4 contain a stored cross-site scripting (XSS) vulnerability that allows authenticated users with low privileges to inject malicious scripts. The vulnerability affects the site's scope, meaning injected code can impact other users and site functionality. An attacker needs a low-privilege account and can inject code that executes in visitors' browsers without additional user interaction.
What an attacker can do
Inject malicious JavaScript that runs in other users' browsers and affects site functionality.
Potential impact on your site
Visitors and admins may have their sessions hijacked, credentials stolen, or be redirected to malicious sites.
Conditions required to exploit
Attacker needs a low-privilege authenticated account; no user interaction required from victims.
Key dates
External resources
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