CVE-2024-13590 is a stored cross-site scripting vulnerability in the ayecode Ketchup Shortcodes WordPress plugin, specifically in the 'spacer' shortcode. The issue stems from improper neutralization of input during web page generation, where user-supplied attributes are not adequately sanitized or escaped. Authenticated attackers with contributor or higher privileges can inject arbitrary JavaScript code that executes in the context of users visiting the compromised pages. This vulnerability affects all versions up to and including 0.1.2. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and partial impact on confidentiality and integrity.

An attacker with contributor-level access or higher can inject persistent malicious scripts into pages via the vulnerable shortcode. These scripts execute in the browsers of users who view the infected pages, potentially leading to theft of sensitive information, session hijacking, or other client-side attacks. The vulnerability does not impact availability. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only and consider disabling or removing the Ketchup Shortcodes plugin to prevent exploitation.