{"cve":"CVE-2017-12621","nvd":{"published":"2017-09-28T01:29:01.293","modified":"2026-06-17T01:03:38.933","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-611"],"references":["http://www.securityfocus.com/bid/101052","http://www.securitytracker.com/id/1039444","https://issues.apache.org/jira/browse/JELLY-293","https://lists.apache.org/thread.html/f1fc3f2c45264af44ce782d54b5908ac95f02bf7ad88bb57bfb04b73%40%3Cdev.commons.apache.org%3E","http://www.securityfocus.com/bid/101052"],"products":["apache:commons_jelly"],"source":"nvd","synced_at":"2026-10-19T20:46:01.145313090+00:00"},"epss":{"cve":"CVE-2017-12621","score":0.0813,"percentile":0.94841,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-6g33-82gc-3pw5","url":"https://osv.dev/vulnerability/GHSA-6g33-82gc-3pw5","summary":"Improper Restriction of XML External Entity Reference in Jelly","modified":"2026-09-10T03:49:20.434020627Z","packages":[{"ecosystem":"Maven","name":"commons-jelly:commons-jelly","purl":"pkg:maven/commons-jelly/commons-jelly","ranges":["<1.0.1"],"fixed":["1.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}