hCaptcha Content-Security-Policy Bypass Scanner
This scanner detects the use of hCaptcha in digital assets. It identifies Content-Security-Policy bypass vulnerabilities associated with hCaptcha integration, ensuring the security of web assets. It's a vital tool for preventing potential cross-site scripting attacks that could compromise user data.
Short Info
Level
Single Scan
Single Scan
Can be used by
Asset Owner
Estimated Time
10 seconds
Time Interval
17 days 23 hours
Scan only one
URL
Toolbox
hCaptcha is a popular CAPTCHA service used to prevent automated bots from accessing web applications. It is deployed by websites to distinguish human users from bots and ensure that only genuine users can interact with their services. Organizations across various industries utilize hCaptcha to secure forms, login pages, and other sensitive interactions on the web. The service enhances security while providing a user-friendly approach to human verification. However, like any web-based service, hCaptcha must be configured correctly to prevent security vulnerabilities. Ensuring that hCaptcha implementations are free from security flaws is crucial to maintaining the integrity of web applications.
The vulnerability overview focuses on a Content-Security-Policy (CSP) bypass in hCaptcha's implementation. CSP bypasses can lead to severe security issues, such as enabling attackers to execute arbitrary code on webpages. An attacker can exploit this vulnerability to inject malicious scripts by circumventing the existing security policies. This vulnerability is particularly concerning as it can lead to Cross-Site Scripting (XSS) attacks, jeopardizing user data and the overall security posture of web applications. The presence of this vulnerability highlights the critical need for continuous security assessments of third-party integrations.
Vulnerability details for this issue include potential flaws in how hCaptcha scripts interact with a website's CSP. The vulnerable endpoint is the website where hCaptcha is integrated, while the vulnerable parameter is the script source loading hCaptcha. Attackers can manipulate this parameter to bypass the CSP, tricking browsers into executing injected scripts. This vulnerability is identified through specific patterns in headers and response behavior upon fuzzing requests to the target website. A combination of header analysis and payload injection assists in detecting potential CSP bypasses. These details allow for precise targeting and testing of web applications to identify such vulnerabilities.
The possible effects of exploiting this vulnerability include unauthorized script execution on the target website. If an attacker successfully bypasses the CSP, they could execute a variety of malicious actions, such as stealing session cookies, defacing the site, or redirecting users to malicious domains. These activities could lead to data breaches, impacting both users and the hosting organization. Moreover, a successful attack could tarnish the reputation of the affected website and lead to substantial financial and operational damages. Therefore, ensuring a secure CSP configuration is vital for web application safety.
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