The Contact Form by Bit Form plugin for WordPress suffers from a stored cross-site scripting vulnerability (CWE-79) due to improper neutralization of input during web page generation. Specifically, SVG file uploads are not properly sanitized or escaped, enabling authenticated attackers with Author-level privileges or higher to embed arbitrary scripts. These scripts execute in the context of users viewing the SVG files, potentially leading to information disclosure or session manipulation. The vulnerability affects all versions up to and including 2.18.3. The CVSS 3.1 base score is 4.9, reflecting network attack vector, high attack complexity, low privileges required, no user interaction, and partial confidentiality and integrity impact. There is no cloud service involved, and no patch or vendor advisory has been provided to confirm remediation status.

An attacker with Author-level access or higher can upload crafted SVG files containing malicious scripts that execute in the browsers of users who view these files. This can lead to partial confidentiality and integrity impacts, such as theft of user data or manipulation of page content. The vulnerability does not affect availability and requires authenticated access with relatively high privileges. No known exploitation in the wild has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Author-level access to trusted users only and consider disabling SVG file uploads if possible. Monitor for updates from the plugin vendor and apply patches promptly once released.