{"id":"CVE-2021-33393","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-33393","generatedAt":"2026-10-27T22:26:14.208Z","title":"It might be owned by an unprivileged account, which could potentially be used to install a Trojan horse backup.pl script that is later executed by root.","description":"lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account. It might be owned by an unprivileged account, which could potentially be used to install a Trojan horse backup.pl script that is later executed by root. Similar problems with the ownership/permissions of other files may be present as well.","published":"2021-06-09T22:15:09.000Z","lastModified":"2026-06-17T03:54:32.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":["ipfire/ipfire"],"epss":{"score":0.59349,"percentile":0.99114,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2021-05-17","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":49869,"kind":"exploit","title":"IPFire 2.25 - Remote Code Execution (Authenticated)","url":"https://www.exploit-db.com/exploits/49869","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/cgi/webapps/49869.py","file":"exploits/cgi/webapps/49869.py","published":"2021-05-17","added":"2021-05-17","updated":"2021-06-11","author":"Mücahit Saratar","type":"webapps","platform":"cgi","port":null,"verified":false,"codes":["CVE-2021-33393"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 59.3%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://github.com/MucahitSaratar/ipfire-2-25-auth-rce","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d64598872126fcf1b217f6","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-17&until=2021-05-17","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/MucahitSaratar/ipfire-2-25-auth-rce","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d64598872126fcf1b217f6","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-17&until=2021-05-17","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33393","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."}