{"id":"CVE-2020-17531","aliases":["EUVD-2022-0951","GHSA-c566-2grg-mjwg"],"status":"published","title":"Deserialization flaw in EOL Tapestry 4.","description":"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. Apache 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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.09996,"percentile":0.95644,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-502"],"published":"2020-12-08T00:00:00Z","modified":"2026-10-24T10:30:56Z","exploits":[{"source":"pocgithub","id":"154802388/CVE-2020-17531","title":"154802388/CVE-2020-17531","date":"2020-12-09","url":"https://github.com/154802388/CVE-2020-17531"}],"fixes":[{"ecosystem":"Maven","package":"org.apache.tapestry:tapestry-project","fixed_in":["5.0.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.apache.tapestry:tapestry-project","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0"},{"fixed":"5.0.1"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.apache.tapestry:tapestry-project","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0"},{"fixed":"5.0.1"}]}],"versions":["4.1","4.1.1","4.1.2","4.1.3","4.1.5","4.1.6"]}],"products":[{"vendor":"apache","product":"tapestry"},{"vendor":"apache software foundation","product":"apache tapestry"}],"references":[{"url":"https://lists.apache.org/thread.html/r700a6aa234dbff0555d4187bdc8274d7e4c0afbf35b9a3457f09ee76%40%3Cusers.tapestry.apache.org%3E","tags":["mailing-list","x_transferred","Mailing List","Vendor Advisory","advisory","web"]},{"url":"https://security.netapp.com/advisory/ntap-20210115-0007/","tags":["x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2022/12/02/1","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-17531","tags":["advisory"]},{"url":"https://lists.apache.org/thread.html/r700a6aa234dbff0555d4187bdc8274d7e4c0afbf35b9a3457f09ee76@%3Cusers.tapestry.apache.org%3E","tags":["web"]},{"url":"https://github.com/advisories/GHSA-c566-2grg-mjwg"},{"url":"https://security.netapp.com/advisory/ntap-20210115-0007","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2020-17531","title":"Deserialization flaw in EOL Tapestry 4.","description":"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. Apache 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.","status":"published","published":"2020-12-08T00:00:00Z","modified":"2024-08-04T14:00:48.808Z","cwes":["CWE-502"],"updated_at":"2026-11-02T14:35:54.80237Z"}],"euvd":[{"id":"EUVD-2022-0951","description":"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. Apache 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.","status":"published","published":"2020-12-08T00:00:00Z","modified":"2024-08-04T14:00:48Z","updated_at":"2026-11-03T03:07:26.951665Z"}],"ghsa":[{"id":"GHSA-c566-2grg-mjwg","title":"Serialization vulnerability in Apache Tapestry","description":"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. Apache 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.","status":"published","published":"2022-02-09T22:50:50Z","modified":"2023-01-31T05:00:22Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:36:29.100018Z"}],"nvd":[{"id":"CVE-2020-17531","description":"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. Apache 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.","status":"published","published":"2020-12-08T13:15:13.01Z","modified":"2026-06-17T02:59:05.843Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:06:27.10541Z"}],"osv":[{"id":"CVE-2020-17531","description":"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. Apache 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.","status":"published","published":"2020-12-08T13:15:13.01Z","modified":"2026-10-24T10:30:56.43039755Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:15.212689Z"},{"id":"GHSA-c566-2grg-mjwg","title":"Serialization vulnerability in Apache Tapestry","description":"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. Apache 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.","status":"published","published":"2022-02-09T22:50:50Z","modified":"2024-02-16T08:19:09.205594Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:46:44.571161Z"}]}}