CVE-2018-16474

Vulnerability

A stored cross-site scripting (XSS) vulnerability exists in the npm package tianma-static versions <=1.0.4. The vulnerability allows an attacker to inject arbitrary JavaScript code into stored content that is later served to users without proper sanitization [1][2].

Exploitation

An attacker can exploit this vulnerability by providing malicious input that is stored by the application and later rendered in a web page. The attacker does not need authentication if the application allows unauthenticated users to submit content that is stored and displayed [1][2]. The exact steps depend on the application's use of tianma-static, but generally involve injecting a crafted payload into a field that is not sanitized.

Impact

Successful exploitation allows the attacker to execute arbitrary JavaScript in the context of a victim's browser. This can lead to theft of cookies, session tokens, or other sensitive data, as well as defacement or redirection to malicious sites [1][2]. The impact is limited to the client side and does not directly affect server resources.

Mitigation

As of the available references, no fixed version has been disclosed for tianma-static. Users should monitor the package repository for updates and consider replacing the package with a maintained alternative if no patch is released [1][2]. If feasible, implement output encoding and content security policies to mitigate the risk of XSS.