FQTag S Content-Security-Policy Bypass Scanner
This scanner detects the use of Content-Security-Policy Bypass - FQTag S in digital assets. It helps identify potential vulnerabilities related to XSS attacks due to weak or misconfigured CSP settings. Protects web applications by ensuring robust implementation of security policies.
Short Info
Level
Single Scan
Single Scan
Can be used by
Asset Owner
Estimated Time
10 seconds
Time Interval
19 days 19 hours
Scan only one
URL
Toolbox
FQTag S is a service used by websites to implement Content-Security-Policy (CSP) headers, which are essential for enhancing security against cross-site scripting and other code injection attacks. These headers regulate which resources can be loaded and executed by a site, thus playing a critical role in web security. Although primarily used by administrators of web applications and websites, it benefits anyone involved in maintaining a website's integrity. The service strives to improve online safety by reducing the risk of unauthorized code execution.
The vulnerability detected in this scanner pertains to a potential bypass of the Content-Security-Policy settings integrated via FQTag S. A CSP bypass allows attackers to circumvent the security measures intended to block malicious scripts, thereby enabling cross-site scripting (XSS) attacks. This vulnerability can surface when the CSP headers are either insufficiently strict or improperly configured, leaving room for exploitation by malicious scripts. Such vulnerabilities undermine a website’s defense strategy, exposing users to various security risks.
In technical terms, the vulnerabile endpoint is identified through the interaction between the header part and specific keywords such as "Content-Security-Policy" and "fqtag.com". The inadequacy arises when these headers do not effectively prevent the injection of malicious scripts. The scanner uses a payload that mimics a typical XSS attack by trying to execute a script from an unregulated source and checks the website's response. If the payload execution is successful, it indicates the CSP headers have been bypassed.
When successful, this vulnerability can lead to severe consequences, ranging from unauthorized data access to full compromise of the affected web application. Users might encounter unwanted scripts that steal cookies or session information, redirect them to malicious websites, or execute harmful operations. The potential for cybercriminals to leverage such vulnerabilities can lead to data breaches, violation of user privacy, and can severely damage an organization’s reputation.
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