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When running Apache Tomcat 7.0.0 to 7.0.79 on Windows with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default to false) it was possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.
Use CWE-434, Apache vendor hub and Tomcat product page to widen CVE-2017-12615 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2026-29145, CVE-2026-34487 and CVE-2026-34486 for nearby disclosures in the same product family.