This vulnerability (CVE-2024-29140) in Matt Manning MJM Clinic is a stored cross-site scripting (CWE-79) issue caused by improper input neutralization during web page generation. It affects MJM Clinic versions up to 1.1.22. The CVSS 3.1 vector indicates the attack requires network access, low attack complexity, high privileges, and user interaction, with impacts on confidentiality, integrity, and availability rated as low to low-medium. No patch or official remediation level has been provided by the vendor as of the publication date.

Successful exploitation could allow an attacker with high privileges to inject malicious scripts that are stored and executed in the context of other users, potentially leading to limited confidentiality, integrity, and availability impacts. However, exploitation requires user interaction and high privileges, which reduces the overall risk. There are no known active exploits reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict high privilege access to trusted users only and apply input validation or output encoding controls where possible to mitigate stored XSS risks.