CVE-2020-7749: 
JavaScript vulnerability analysis and mitigation

CVE-2020-7749 is a vulnerability that allows attackers to inject arbitrary HTML/JS code into web applications. The vulnerability was disclosed and identified in October 2020, affecting applications that do not properly sanitize special characters in user input (NVD).

The vulnerability stems from improper sanitization of special characters like quotes and double quotes in user input, which can lead to Cross-Site Scripting (XSS) attacks. When unsanitized input containing malicious JavaScript code is processed, it may be outputted as HTML in the application context (NVD).

If successfully exploited, this vulnerability allows attackers to inject and execute arbitrary HTML and JavaScript code in the context of the vulnerable application. This could lead to theft of sensitive information, session hijacking, or other malicious actions performed in the user's browser context (NVD).

The vulnerability can be exploited by providing specially crafted input containing malicious JavaScript code. An example of such input could include payloads like ''+alert(1)+'' which, if not properly sanitized, would be executed in the browser (GitHub PR).

The vulnerability was addressed by implementing proper character escaping for special characters before template insertion. The fix involves sanitizing characters such as quotes and double quotes to prevent XSS payloads from being executed (GitHub PR).