{"id":"CVE-2017-16921","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-16921","generatedAt":"2026-10-28T23:56:00.340Z","title":"In OTRS 6.0.x up to and including 6.0.1, OTRS 5.0.x up to and including 5.0.24, and OTRS 4.0.x up to and including 4.0.26, an attacker who is logged into OTRS as an agent can manipulate form parameters (related to PGP) and execute arbitrary shell…","description":"In OTRS 6.0.x up to and including 6.0.1, OTRS 5.0.x up to and including 5.0.24, and OTRS 4.0.x up to and including 4.0.26, an attacker who is logged into OTRS as an agent can manipulate form parameters (related to PGP) and execute arbitrary shell commands with the permissions of the OTRS or web server user.","published":"2017-12-08T15:29:00.000Z","lastModified":"2026-06-17T01:10:09.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":8.8,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-78"],"affected":["otrs/otrs","debian/debian linux"],"epss":{"score":0.19901,"percentile":0.97411,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.14584,"percentile":0.96548},{"date":"2026-09-22","score":0.19901,"percentile":0.97305}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2018-01-21","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":43853,"kind":"exploit","title":"OTRS 5.0.x/6.0.x - Remote Command Execution (1)","url":"https://www.exploit-db.com/exploits/43853","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/perl/webapps/43853.txt","file":"exploits/perl/webapps/43853.txt","published":"2018-01-21","added":"2018-01-21","updated":"2021-04-22","author":"Bæln0rn","type":"webapps","platform":"perl","port":null,"verified":false,"codes":["CVE-2017-16921"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comotrs-6.0.1.tar.bz2","screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 19.9%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.19901,"from":0.14584,"percentile":0.97305},"summary":"EPSS moved from 14.6% to 19.9% probability of exploitation in the next thirty days."}],"references":[{"url":"http://packetstormsecurity.com/files/162295/OTRS-6.0.1-Remote-Command-Execution.html","source":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2017/12/msg00015.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.debian.org/security/2017/dsa-4066","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/43853/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://www.otrs.com/security-advisory-2017-09-security-update-otrs-framework/","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/162295/OTRS-6.0.1-Remote-Command-Execution.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2017/12/msg00015.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2017/dsa-4066","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/43853/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.otrs.com/security-advisory-2017-09-security-update-otrs-framework/","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-16921","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."}