CVE-2021-43725 Scanner

Spotweb is a decentralized usenet indexing application that allows users to browse through categorized usenet posts. It is widely used by individuals and organizations for accessing a vast array of content ranging from multimedia to software and discussions. Spotweb is known for its ease of setup and use, making it a popular choice among usenet users. It runs on a web server and can be accessed through any standard web browser. The platform serves as a self-hosted web-based client, enabling users to search for and download usenet posts.

The vulnerability is present in the SpotPage_login.php file of Spotweb versions 1.5.1 and below. Attackers can exploit this vulnerability by crafting malicious URLs containing JavaScript code in the data[performredirect] parameter. When a user visits this malicious URL, the injected script executes within their browser context. This script execution can lead to unauthorized actions being performed on behalf of the user, data theft, and potential compromise of the user's session.

If exploited, this XSS vulnerability can lead to several adverse effects including session hijacking, where attackers gain control over a user's session; theft of sensitive information like cookies and personal data; and delivering malware to the victim's system. It compromises the integrity and confidentiality of user data and can severely undermine the security of the affected web application.

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References

• https://github.com/spotweb/spotweb/
• https://github.com/spotweb/spotweb/issues/718
• https://nvd.nist.gov/vuln/detail/CVE-2021-43725
• https://github.com/spotweb/spotweb/commit/2bfa001689aae96009688a193c64478647ba45a1