The Takashi Matsuyama My Favorites application up to version 1.4.1 contains a stored cross-site scripting vulnerability (CVE-2024-49263) caused by improper neutralization of input during web page generation. This allows attackers with limited privileges to inject malicious scripts that persist and execute in the context of other users. The vulnerability has a CVSS 3.1 base score of 6.5, reflecting network attack vector, low attack complexity, required privileges, user interaction, and impacts on confidentiality, integrity, and availability. No patch or official remediation guidance is currently provided by the vendor.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of other users, potentially leading to information disclosure, session hijacking, or other impacts on confidentiality, integrity, and availability. The CVSS score of 6.5 indicates a medium impact level. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider restricting access to the affected application and applying any available input validation or web application firewall rules that may mitigate stored XSS risks. Monitor vendor communications for updates on patches or official mitigations.