History
Perl supported tainting from at least 1989 as the -T switch was included in Perl 3.
In 1996 Netscape implemented data tainting in server-side JavaScript in Netscape Communications Server, as well as client-side for Netscape Navigator 3. However, since the client-side support was considered experimental it shipped disabled (requiring user intervention to activate), and required page authors to modify scripts to benefit from it. Other browser vendors never implemented the functionality; nor did Communications Server's primary competition, Microsoft's (then) new Internet Information Server.
Read more about this topic: Taint Checking
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