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CVE-2026-100716: froxlor

Severity

9.4 (CRITICAL)

Vendor

FROXLOR

Affected versions

0 through before 2.3.12

Fixed version

2.3.12

Patch status

Patched

Published

2026-09-26T14:16:57.583

Modified

2026-09-26T14:16:57.707

Why it matters

Critical vulnerability requiring immediate validation against your environment.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.
• Compare installed versions against the affected version range in the advisory.

Technical summary

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.

View the official NVD record for CVE-2026-100716

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.