CVE-2020-23689

Vulnerability

A stored cross-site scripting (XSS) vulnerability exists in the comments section of the news page in YFCMF v2.3.1 [1]. The application fails to sanitize or escape user input submitted through the comment form, allowing arbitrary HTML and JavaScript to be stored and later executed when the comment is viewed [1].

Exploitation

An attacker must first log in as an administrator to reach the news article page where comments can be submitted (e.g., http://192.168.211.1/YFCMF-master/news/12.html) [1]. The attacker then leaves a comment containing a payload such as `` [1]. The payload is stored in the database and executed when the comment is rendered in the administrator's backend interface [1].

Impact

Successful exploitation results in stored XSS, enabling the attacker to execute arbitrary JavaScript in the context of the browser session of any user viewing the maliciously crafted comment [1]. This could lead to session hijacking, defacement, or theft of sensitive information.

Mitigation

No fix or patch version has been released by the vendor as of the publication date. Users should implement output encoding and input validation for the comment field, and avoid using the application in production environments until a security update is available.