Attackers intending to exploit cross-site scripting vulnerabilities must approach each class of vulnerability differently. The vulnerability has the Common Vulnerabilities and Exposures designation . This vulnerability is denoted by entry in the Common Vulnerabilities and Exposures (CVE) catalog. There are also many other security vulnerabilities and shortcomings. They may make transparent corporate vulnerabilities that activists can exploit. Security patches are the primary method of fixing security vulnerabilities in software. Domain validation implementations have sometimes been a source of security vulnerabilities. Details of the update were fixes for the three critical security vulnerabilities that Pegasus exploited. Undefined behavior can lead to security vulnerabilities in software. This is useful for testing implementations of IP stacks for bugs and security vulnerabilities. Consequently, delimiter collision can be the source of security vulnerabilities and exploits. Internet Explorer has been subjected to many security vulnerabilities and concerns. It checked for thousands of known security vulnerabilities in web servers. They include hardware mitigations against certain Meltdown/Spectre vulnerabilities. Mozilla claims that all patched vulnerabilities of Mozilla products are publicly listed.