CVE-2020-19286

Vulnerability

A stored cross-site scripting (XSS) vulnerability exists in Jeesns 1.4.2 in the /question/detail component. An attacker can inject arbitrary web scripts or HTML through a crafted payload in the source field of the editor. The vulnerability is triggered when the stored payload is later rendered to administrators or other users viewing the question detail page [1].

Exploitation

An attacker with the ability to create or edit questions (or if the application allows unauthenticated submission) can craft a malicious payload in the source field of the editor. No elevated privileges are required beyond the ability to submit content. The payload is stored on the server and executed when any user, including administrators, visits the /question/detail page. No user interaction beyond viewing the page is needed [1].

Impact

Successful exploitation allows the attacker to execute arbitrary JavaScript or HTML in the context of the victim's browser. This can lead to session hijacking, credential theft, defacement, or redirection to malicious sites. The impact is limited by the browser's same-origin policy but can affect any user accessing the vulnerable page, including administrators [1].

Mitigation

No fix has been released for Jeesns 1.4.2 as of the latest disclosure. The project may be discontinued or unmaintained. The recommended mitigation is to upgrade to a patched version if available, or to apply input sanitization and output encoding on the source field. Administrators should restrict content submission to trusted users and consider using a web application firewall (WAF) to filter XSS payloads [1].