{"id":"CVE-2021-23901","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-23901","generatedAt":"2026-10-27T23:38:11.309Z","title":"An XML external entity (XXE) injection vulnerability was discovered in the Nutch DmozParser and is known to affect Nutch versions < 1.18.","description":"An XML external entity (XXE) injection vulnerability was discovered in the Nutch DmozParser and is known to affect Nutch versions < 1.18. XML external entity injection (also known as XXE) is a web security vulnerability that allows an attacker to interfere with an application's processing of XML data. It often allows an attacker to view files on the application server filesystem, and to interact with any back-end or external systems that the application itself can access. This issue is fixed in Apache Nutch 1.18.","published":"2021-01-25T10:16:33.000Z","lastModified":"2026-06-17T03:39:01.000Z","status":"Modified","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-611"],"affected":["apache/nutch","netapp/snap creator framework"],"epss":{"score":0.04412,"percentile":0.91272,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://issues.apache.org/jira/browse/NUTCH-2841","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r090321840b44cc91086c4e317bf2baffa270749dde6c1273b6567f7c%40%3Cdev.nutch.apache.org%3E","tags":["Mailing List","Vendor Advisory"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r5e2f7737b42c73a3325f3c2c8cdee1ec27631b3a0e144104d84d70e6%40%3Cannounce.apache.org%3E","source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r7ddfd680aa7ea001ca8da63bb23e3f8caa095a8b4f2261e46bade5c7%40%3Cdev.nutch.apache.org%3E","source":"security@apache.org"},{"url":"https://security.netapp.com/advisory/ntap-20210513-0003/","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://issues.apache.org/jira/browse/NUTCH-2841","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r090321840b44cc91086c4e317bf2baffa270749dde6c1273b6567f7c%40%3Cdev.nutch.apache.org%3E","tags":["Mailing List","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r5e2f7737b42c73a3325f3c2c8cdee1ec27631b3a0e144104d84d70e6%40%3Cannounce.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r7ddfd680aa7ea001ca8da63bb23e3f8caa095a8b4f2261e46bade5c7%40%3Cdev.nutch.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210513-0003/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-23901","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."}