{"id":"CVE-2021-21659","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-21659","generatedAt":"2026-10-27T22:33:03.638Z","title":"Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.","description":"Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.","published":"2021-05-25T17:15:08.000Z","lastModified":"2026-06-17T03:35:57.000Z","status":"Modified","sourceIdentifier":"jenkinsci-cert@googlegroups.com","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"},"cwe":[],"affected":["jenkins/urltrigger"],"epss":{"score":0.66774,"percentile":0.99286,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 66.8%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2021/05/25/3","tags":["Mailing List","Third Party Advisory"],"source":"jenkinsci-cert@googlegroups.com"},{"url":"https://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2341","tags":["Vendor Advisory"],"source":"jenkinsci-cert@googlegroups.com"},{"url":"http://www.openwall.com/lists/oss-security/2021/05/25/3","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2341","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-21659","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."}