{"id":"CVE-2017-12621","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-12621","generatedAt":"2026-10-28T23:56:02.562Z","title":"This could lead to XML External Entity (XXE) attacks in Apache Commons Jelly before 1.0.1.","description":"During Jelly (xml) file parsing with Apache Xerces, if a custom doctype entity is declared with a \"SYSTEM\" entity with a URL and that entity is used in the body of the Jelly file, during parser instantiation the parser will attempt to connect to said URL. This could lead to XML External Entity (XXE) attacks in Apache Commons Jelly before 1.0.1.","published":"2017-09-28T01:29:01.000Z","lastModified":"2026-06-17T01:03:39.000Z","status":"Modified","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-611"],"affected":["apache/commons jelly"],"epss":{"score":0.0813,"percentile":0.94813,"date":"2026-10-27","history":[{"date":"2026-10-10","score":0.0813,"percentile":0.94721}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (8.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/101052","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"http://www.securitytracker.com/id/1039444","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"https://issues.apache.org/jira/browse/JELLY-293","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/f1fc3f2c45264af44ce782d54b5908ac95f02bf7ad88bb57bfb04b73%40%3Cdev.commons.apache.org%3E","source":"security@apache.org"},{"url":"http://www.securityfocus.com/bid/101052","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1039444","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://issues.apache.org/jira/browse/JELLY-293","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/f1fc3f2c45264af44ce782d54b5908ac95f02bf7ad88bb57bfb04b73%40%3Cdev.commons.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-12621","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}