The Happy Addons for Elementor plugin suffers from a stored XSS vulnerability due to improper neutralization of input in the ‘archive_title_tag’ attribute of the Archive Title widget. Authenticated users with contributor or higher privileges can inject arbitrary web scripts that persist and execute in the context of users visiting the compromised pages. This vulnerability arises from insufficient sanitization and escaping of user-supplied input before rendering on web pages. The CVSS 3.1 score is 6.4 (medium), reflecting network attack vector, low attack complexity, required privileges at the contributor level, no user interaction, and impacts on confidentiality and integrity but not availability.

An attacker with contributor-level access or higher can inject persistent malicious scripts into pages via the vulnerable attribute. These scripts execute in the browsers of users visiting the injected pages, potentially leading to unauthorized actions or data disclosure within the context of the affected site. The impact is limited to confidentiality and integrity with no direct availability impact. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only and consider disabling or limiting use of the Archive Title widget. Monitor for updates from thehappymonster regarding patches or official mitigations.