{"id":"CVE-2026-41235","aliases":["GHSA-gcv3-5v9q-fmhh"],"url":"https://o3.security/vulnerability/CVE-2026-41235","summary":"Froxlor has an authorization bypass in FTP shell assignment via missing server-side `available_shells` enforcement","details":"Froxlor is open source server administration software. Version 2.3.6 lets administrators configure `system.available_shells` as the approved shell list that customers may assign to FTP users. However, the server-side FTP account handlers do not enforce that whitelist when processing add or edit requests. As a result, an authenticated customer with shell delegation enabled can submit an arbitrary shell such as `/bin/bash` even when the panel UI only offers more restricted choices. In deployments that use the default `nssextrausers` integration, the attacker-controlled shell is then propagated into the system account database, leading to real host shell access. Version 2.3.7 fixes the issue.","published":"2026-06-04T17:50:09.899Z","modified":"2026-08-12T03:51:45.580830156Z","cvss":null,"epss":{"score":0.00227,"percentile":0.13595,"asOf":"2026-08-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"froxlor/froxlor","fixedVersion":"2.3.7"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/froxlor/froxlor/releases/tag/2.3.7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41235.json"},{"type":"ADVISORY","url":"https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41235"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:45.580830156Z"}}