polyfill-fastly.io
MarkMonitor Inc.
unsigned
Yes
This script analyzes client-side JavaScript code to identify potential security vulnerabilities within the code.
Data on this page is collected by cside's crawler, which monitors third-party scripts across the public web.
Polyfill.io (Fastly)
Category: framework
Description
Polyfill.io (Fastly) is a Fastly-hosted service that delivers JavaScript polyfills to ensure browser compatibility, created as a safe replacement for the compromised original polyfill.io domain.
AI Review
The vendor's scripts at fastly.com, particularly the polyfills on polyfill-fastly.io, serve the important function of enhancing JavaScript compatibility for users on older browsers. This is essential for maintaining consistent experiences across varied environments, especially when sensitive operations like payment processing are involved. However, the use of code obfuscation in these scripts raises transparency concerns, limiting the ability to conduct thorough security assessments and potentially concealing vulnerabilities. While the functionality provided is beneficial for access to modern JavaScript features like Promises and Maps, the obfuscation may inadvertently introduce risks if not properly scrutinized. Fortunately, there have been no alerts or abusive behaviors detected in the past week, indicating that the scripts are operating within expected parameters without raising high-risk signals. The primary risk centers around ensuring that the obfuscated portions do not harbor unintended security issues that could affect payment interactions or overall user safety in sensitive contexts. Continuous monitoring and audits of these obfuscated scripts are advisable to ensure they remain secure and do not compromise data integrity.
Script hostnames
No meta tags found.
Enabled
polyfill-fastly.io is one of thousands of third-party scripts on the web.
Most sites run dozens of third-party scripts and can't say what each one does. cside monitors every script on your site and catches the ones that change or turn malicious.
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| polyfill-fastly.io | NS | 3600 | walnut.fastlydns.com. | |
| polyfill-fastly.io | NS | 3600 | walnut.fastlydns.org. | |
| polyfill-fastly.io | NS | 3600 | edns1.ultradns.com. | |
| polyfill-fastly.io | NS | 3600 | walnut.fastlydns.net. | |
| polyfill-fastly.io | NS | 3600 | ns-cloud-e2.googledomains.com. | |
| polyfill-fastly.io | NS | 3600 | walnut.fastlydns.dev. | |
| polyfill-fastly.io | NS | 3600 | ns-cloud-e1.googledomains.com. | |
| polyfill-fastly.io | NS | 3600 | edns1.ultradns.net. | |
| polyfill-fastly.io | A | 803 | 151.101.129.91 | |
| polyfill-fastly.io | A | 803 | 151.101.193.91 | |
| polyfill-fastly.io | A | 803 | 151.101.65.91 | |
| polyfill-fastly.io | A | 803 | 151.101.1.91 | |
| polyfill-fastly.io | AAAA | 2605 | 2a04:4e42:400::347 | |
| polyfill-fastly.io | AAAA | 2605 | 2a04:4e42:200::347 | |
| polyfill-fastly.io | AAAA | 2605 | 2a04:4e42:600::347 | |
| polyfill-fastly.io | AAAA | 2605 | 2a04:4e42::347 | |
| polyfill-fastly.io | SOA | 3600 | edns1.ultradns.com. hostmaster.fastly.com. 2024022345 3600 600 604800 1800 |
FAQ
Frequently Asked Questions
This domain is analyzed as part of cside's domain directory to identify third-party scripts and their purposes. The summary provides information about what services, tools, or scripts this domain hosts, helping website owners understand which third-party services are being loaded on their sites.
The risk score is calculated based on multiple security factors including SSL certificate validity, DNSSEC status, domain registration details, and historical security data. A higher score indicates lower risk, while a lower score suggests potential security concerns that should be investigated.
The SSL certificate information shows whether the domain uses HTTPS encryption, when the certificate was issued, when it expires, and who issued it. This helps verify the domain's security posture and identify potential certificate-related vulnerabilities that could affect your website's security.
Third-party script domains can be compromised or used maliciously. By monitoring domain information like registration details, SSL certificates, and DNS records, you can identify suspicious changes, expired certificates, or domains that may pose security risks to your website and users.
Domain information is regularly scanned and updated to provide the most current security intelligence. The last scanned timestamp shows when the most recent analysis was performed, ensuring you have up-to-date information about the domain's security status.
If you identify a high-risk domain loading scripts on your website, you should investigate why it's being used, verify its legitimacy, and consider removing or replacing it if it's not essential. Use cside's platform to monitor and block suspicious third-party scripts to protect your users from potential security threats.
Subscribe to our newsletter to get the full picture
Stay updated with our latest news, offers and blog posts. Subscribe for exclusive updates delivered straight to your inbox.
Your inbox stays chill, we pop in monthly.
