{"id":"CVE-2026-100716","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-100716","generatedAt":"2026-10-27T22:46:35.477Z","title":"Froxlor is a server administration panel.","description":"Froxlor is a server administration panel. In versions 2.3.10 and earlier, the customer data-export (DataDump) cron fails to validate intermediate path components of the export destination: Froxlor\\FileDir::makeCorrectDir() contains an off-by-one in its path-component walk that skips the first segment below the customer home directory, and the guard in ExportCron.php checks only the final component with is_link(). An authenticated customer whose account has the export feature enabled can schedule an export into a genuine subdirectory of their own webspace, then replace an intermediate path component with a symlink before the root-owned cron runs. The cron's `chown -R` then recursively changes ownership of the linked directory tree — for example /etc — to the customer's UID, yielding host root and cross-tenant compromise. Exploitation is deterministic and requires no race. This is an incomplete fix of GHSA-75h4-... The issue is fixed in Froxlor 2.3.12.","published":"2026-09-26T14:16:58.000Z","lastModified":"2026-09-28T15:17:11.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":9.4,"severity":"CRITICAL","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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-59"],"affected":[],"epss":{"score":0.00464,"percentile":0.39954,"date":"2026-10-26","history":[{"date":"2026-09-27","score":0.00393,"percentile":0.30868}]},"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 (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-26T14:16:58.000Z","detail":{"score":"9.4","severity":"CRITICAL","publishedAt":"2026-09-26T14:16:57.583Z"},"summary":"New CVE, critical severity (CVSS 9.4)."}],"references":[{"url":"https://github.com/froxlor/froxlor/security/advisories/GHSA-2wjc-6mgx-hq42","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/froxlor-before-2.3.12-privilege-escalation-via-symlink","source":"disclosure@vulncheck.com"},{"url":"https://github.com/froxlor/froxlor/security/advisories/GHSA-2wjc-6mgx-hq42","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100716","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."}