CVE-2024-4703 is a stored cross-site scripting vulnerability in the One Page Express Companion plugin for WordPress, affecting all versions up to 1.6.37. The issue arises from improper neutralization of user-supplied input in the one_page_express_contact_form shortcode, allowing authenticated users with contributor or higher privileges to inject arbitrary web scripts. These scripts execute in the context of any user accessing the compromised page, potentially leading to information disclosure or session hijacking. The vulnerability has a CVSS 3.1 base score of 6.4 (medium severity), with network attack vector, low attack complexity, and privileges required at the contributor level.

An attacker with contributor-level access or higher can inject persistent malicious scripts into pages via the vulnerable shortcode. When other users visit these pages, the injected scripts execute in their browsers, potentially leading to information disclosure or manipulation of user sessions. The vulnerability does not affect availability and requires authenticated access, limiting the attack surface.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and consider disabling or removing the One Page Express Companion plugin if not essential. Monitor for updates from the vendor and apply patches promptly once released.