CVE-2024-13470 is a stored cross-site scripting vulnerability in the Ninja Forms WordPress plugin (up to version 3.8.24). The issue arises from improper neutralization of input during web page generation, specifically insufficient sanitization and output escaping of user-supplied shortcode attributes. This allows authenticated attackers with contributor-level privileges or higher to inject arbitrary scripts that execute in the context of users viewing the compromised pages. The vulnerability is classified under CWE-79 and has a CVSS 3.1 base score of 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N).

Successful exploitation allows an attacker with contributor or higher privileges to inject and execute arbitrary JavaScript in the browsers of users who view the affected pages. This can lead to information disclosure and integrity impacts within the scope of the affected site. There is no indication of availability impact. The vulnerability affects confidentiality and integrity but requires authenticated access with limited privileges.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access and above to trusted users only. Consider disabling or limiting the use of shortcodes in user-generated content to reduce exposure.