https://www.googletagmanager.com/gtag/js?id=UA-123439436-23

Category: Advertising & Tracking

Keywords: apps data error found learn suite thats center found1 google server manager business analytics marketing requested solutions management attribution measurement


Last fetched: 2019-11-08T15:46:45.635538+00:00

HTTP status: 5 Sub-resource URL


TLS/SSL configuration report

TLS score
F
Grade capped at F
Certificate path cannot be verified to a known root certificate

See full SSL/TLS security report for www.googletagmanager.com

Security-related HTTP headers

  • Access-Control-Allow-Origin: http://www.googletagmanager.com

    Controls origins (websites) that are allowed to load data from this web service over JavaScript-based APIs as part of Cross-Origin Resource Sharing (CORS) standard. By default, a web browser will refuse to load data over XmlHttpRequest from a website that is not in the same origin, which is a precaution against various types of data stealing attacks. The target server has to explicitly allow the origin domain using the Access-Control-Allow-Origin (ACAO) header, or it may allow all origins to access it using a wildcard *. The latter however creates a potential security issue if the website in question is transactional and processing sensitive data, so the wildcard should be only used on websites consciously offering public APIs.

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  • Server: Google Tag Manager

    Announces web server software and optionally version details.

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  • X-XSS-Protection: 0

    Controls an Cross-Site Scripting (XSS) filters built into the majority of web browsers. The filter is usually turned on by default anyway, but requirement to set the header to 1 became part of canonical set of "secure" HTTP headers. Over time, vulnerabilities in the "sanitizing" mode filter were found, so 1; mode=block became the recommended value. Some companies decided that they don't really need a browser-side XSS filter to mess with their web services which are XSS-free anyway and they became consciously disabling the XSS filter by setting the header to 0.

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