This vulnerability in CozyThemes Cozy Blocks (cozy-addons) involves improper neutralization of input during web page generation, resulting in a stored cross-site scripting (XSS) flaw. It affects Cozy Blocks versions up to 2.0.15. An attacker with low privileges and requiring user interaction can exploit this to execute arbitrary scripts in the context of other users, potentially leading to partial confidentiality, integrity, and availability impacts. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L, reflecting network attack vector, low attack complexity, low privileges required, user interaction needed, scope change, and low impacts on confidentiality, integrity, and availability.

Successful exploitation can allow an attacker to execute arbitrary scripts in the victim's browser, potentially leading to data theft, session hijacking, or other malicious actions within the scope of the vulnerable application. The impact is rated medium with partial loss of confidentiality, integrity, and availability. 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 a patch is available, limit privileges of users who can input data into Cozy Blocks and consider applying web application firewall (WAF) rules to detect and block XSS payloads. Monitor vendor channels for updates and apply official fixes once released.