S4E just found a high-severity finding from top 10 tcp port service scan
PlatformPlansPartners
Resources
ToolsBlogDocs
Sign Up →
medium·Product Based Web Vulnerabilities·Updated Sep 11, 2025

beslist.nl Content Security Policy bypass Scanner

This scanner detects the use of beslist.nl in digital assets. It specifically identifies vulnerabilities related to Content-Security-Policy bypasses which could allow cross-site scripting attacks, aiding in securing web applications.

Est. Time~10 seconds
Scan TypeSingle Scan
Targetsurl
CostFree
3.4k
Times Used
continuous scan runs
3.4k
Continuously Checked
assets under CS
0
Vulnerabilities Found
confirmed findings
References
Detail

This scanner is used to detect vulnerable instances of beslist.nl, an online shopping and comparison platform used by consumers and retailers. It helps identify vulnerabilities that could lead to unauthorized data access and manipulation, ensuring digital asset security. Software like beslist.nl is essential for managing online business operations and providing customer services. By detecting security loopholes, this scanner aids developers and security teams in maintaining a secure application environment. It plays a crucial role in safeguarding sensitive data from breaches.

The vulnerability identified involves Content-Security-Policy (CSP) bypasses, primarily associated with Cross-Site Scripting (XSS) attacks. CSP is a critical security feature that helps to prevent various types of code injection attacks, including XSS. Bypassing CSP can lead to the execution of malicious scripts in a user's browser, potentially leading to data theft or session hijacking. The scanner identifies misconfigurations in CSP that could open pathways for such bypasses. Understanding and patching this vulnerability is key to strengthening an application's security posture.

In technical terms, the scanner checks for specific words in headers, such as 'Content-Security-Policy' and 'beslist.nl', to confirm the presence of the policy. The payload used involves injecting a script that triggers an alert, serving as a proof of concept for XSS vulnerabilities. It leverages headless browsing to navigate and execute the payload, assessing the CSP's robustness. This detailed analysis allows identifying actionable security weaknesses. Correct interpretation and response to these findings are crucial for effective web application security management.

Exploitation of this vulnerability can lead to significant impacts, such as unauthorized access to sensitive data, manipulation of web content, and malicious redirection of users. If attackers manage to bypass CSP effectively, they gain the potential to conduct phishing attacks, distribute malware, and undermine user trust. Long-term consequences include brand damage, financial losses, and legal repercussions. Addressing these risks proactively is essential to maintaining robust cybersecurity defenses and ensuring the integrity of digital operations.

REFERENCES

Solution Advice
  • Reevaluate and strengthen the Content-Security-Policy configurations to minimize XSS risks.
  • Ensure all inputs are sanitized and validated properly to prevent code injection attacks.
  • Implement additional security headers, such as X-XSS-Protection and X-Frame-Options, as a layered security measure.
  • Regularly update and patch all web application libraries and frameworks.
  • Conduct routine security assessments and audits to ensure compliance with best practices.

Get AI-powered remediation steps tailored to your asset.

Try AI Solutions →

Check your infrastructure.
Right now.

11,000+ scanners. Free to start. No credit card required.

beslist.nl Content Security Policy bypass Scanner | S4E