A stored cross-site scripting (XSS) vulnerability exists in pH7Software pH7-Social-Dating-CMS 17.9.1 in the application's message system. Unsanitized message content submitted by one user is persisted by the server and later rendered in another user's Inbox view without appropriate context-aware encoding. As a result, attacker-controlled content executes in the recipient's browser context when the Inbox message is viewed.