This vulnerability in MyBookProgress by Stormhill Media (versions up to 1.0.8) involves improper neutralization of input during web page generation, resulting in stored cross-site scripting (XSS). An attacker could inject malicious scripts that persist on the server and execute in the context of other users' browsers. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with impact on confidentiality, integrity, and availability at a low level. No patch or vendor advisory is currently provided.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of affected users, potentially leading to information disclosure, session hijacking, or other impacts on confidentiality, integrity, and availability. The CVSS score of 6.5 reflects a medium severity impact. No known exploits in the wild have been reported to date.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should apply standard XSS mitigations such as input validation and output encoding on their own deployments if possible. Monitor vendor channels for updates regarding patches or official fixes.