{"id":"CVE-2026-41235","state":"PUBLISHED","title":"Froxlor has an authorization bypass in FTP shell assignment via missing server-side `available_shells` enforcement","description":"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.","publishedAt":"2026-06-04T17:50:09.899Z","updatedAt":"2026-06-08T18:29:21.384Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P","source":"GitHub_M"},"assigner":"GitHub_M","products":["froxlor froxlor"],"affected":[{"vendor":"froxlor","product":"froxlor","versions":[{"version":"= 2.3.6","status":"affected"}]}],"references":["https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh","https://github.com/froxlor/froxlor/releases/tag/2.3.7"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41235.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41235","state":"PUBLISHED","datePublished":"2026-06-04T17:50:09.899Z","dateUpdated":"2026-06-08T18:29:21.384Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-18T03:47:03.134Z"},"containers":{"cna":{"title":"Froxlor has an authorization bypass in FTP shell assignment via missing server-side `available_shells` enforcement","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"froxlor","product":"froxlor","versions":[{"version":"= 2.3.6","status":"affected"}]}],"references":[{"url":"https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh","name":"https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/froxlor/froxlor/releases/tag/2.3.7","name":"https://github.com/froxlor/froxlor/releases/tag/2.3.7","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-04T17:50:09.899Z"},"source":{"advisory":"GHSA-gcv3-5v9q-fmhh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/froxlor/froxlor/security/advisories/GHSA-gcv3-5v9q-fmhh","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-08T18:29:06.216963Z","id":"CVE-2026-41235","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-08T18:29:21.384Z"}}]}}}