{"schema_version": "1.6.1", "id": "CVE-2020-17531", "summary": "Deserialization flaw in EOL Tapestry 4.", "details": "A Java Serialization vulnerability was found in Apache Tapestry 4. Apache Tapestry 4 will attempt to deserialize the \"sp\" parameter even before invoking the page's validate method, leading to deserialization without authentication.\n\nApache Tapestry 4 reached end of life in 2008 and no update to address this issue will be released.  Apache Tapestry 5 versions are not vulnerable to this issue.  Users of Apache Tapestry 4 should upgrade to the latest Apache Tapestry 5 version.", "affected": [{"ranges": [{"type": "SEMVER", "events": [{"introduced": "Apache Tapestry 4"}, {"last_affected": "Apache Tapestry 4"}]}]}], "references": [{"type": "ADVISORY", "url": "https://lists.apache.org/thread.html/r700a6aa234dbff0555d4187bdc8274d7e4c0afbf35b9a3457f09ee76%40%3Cusers.tapestry.apache.org%3E"}]}