This paper describes the development of a Web Crawler to examine and carry out securety tests and vulnerability analysis on information, which may contain gaps that allow damage the integrity and reliability of web pages. With the results, it was possible to generate projections of problems, possible causes, and recommendations in order to alert and assist site administrators about potential problems, indicating a treatment near the ideal. To validate our proposal we performed experiments on real sites. The experimental results show the tool's effectiveness to identify different problems in all the analyzed sites, and indicate its possible solutions. Moreover, all the procedures were carried out correctly without damaging the structures and information from the pages of websites, making its use important to the reduction of existing attacks, helping developers and administrators of the sites that did not have knowledge of these faults or of the gravity that they can bring.
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