{"id":"CVE-2016-6798","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-6798","generatedAt":"2026-10-28T20:46:54.829Z","title":"In the XSS Protection API module before 1.0.12 in Apache Sling, the method XSS.getValidXML() uses an insecure SAX parser to validate the input string, which allows for XXE attacks in all scripts which use this method to validate user input, potentially…","description":"In the XSS Protection API module before 1.0.12 in Apache Sling, the method XSS.getValidXML() uses an insecure SAX parser to validate the input string, which allows for XXE attacks in all scripts which use this method to validate user input, potentially allowing an attacker to read sensitive data on the filesystem, perform same-site-request-forgery (SSRF), port-scanning behind the firewall or DoS the application.","published":"2017-07-19T15:29:00.000Z","lastModified":"2026-06-17T00:51:47.000Z","status":"Modified","sourceIdentifier":"security@apache.org","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-611"],"affected":["apache/sling"],"epss":{"score":0.03669,"percentile":0.89593,"date":"2026-10-27","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 (3.67%). 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/99873","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/b72c3a511592ec70729b3ec2d29302b6ce87bbeab62d4745617a6bd0%40%3Cdev.sling.apache.org%3E","source":"security@apache.org"},{"url":"http://www.securityfocus.com/bid/99873","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/b72c3a511592ec70729b3ec2d29302b6ce87bbeab62d4745617a6bd0%40%3Cdev.sling.apache.org%3E","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-6798","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."}