SSCMS v7.4.0 contains a reflected cross-site scripting vulnerability in the STL processing endpoint that allows attackers to execute arbitrary JavaScript by crafting malicious STL template payloads that are decrypted and returned without proper sanitization. Attackers can exploit improper output encoding in the /api/stl/actions/dynamic endpoint to inject executable JavaScript into JSON responses, leading to session hijacking, phishing attacks, and unauthorized actions performed on behalf of users.

An arbitrary file read vulnerability in the ReadTextAsynchronous function of SSCMS v7.3.1 allows attackers to read arbitrary files via sending a crafted GET request to /cms/templates/templatesAssetsEditor.

SSCMS 7.2.2 was discovered to contain a cross-site scripting (XSS) vulnerability via the Content Management component.