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 Post Flagger plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'flag' shortcode in all versions up to, and including, 1.1 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
Post Flagger versions 1.1 and earlier contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts affecting other users on the site. The vulnerability requires low-level authentication and does not require user interaction to trigger. An attacker can inject code that executes in other users' browsers, potentially stealing session data or performing actions on their behalf.
What an attacker can do
Inject malicious scripts that execute in other users' browsers and steal their session data or perform actions on their behalf.
Potential impact on your site
Any authenticated user can inject scripts affecting other site users, compromising account security and data integrity.
Conditions required to exploit
Attacker must have a low-privilege user account on the site; no user interaction required.
Key dates
External resources
