CVE-2026-100716 Froxlor before 2.3.12 Privilege Escalation via Symlink
Authenticated users can escalate privileges to root by exploiting a symlink vulnerability in the data-export cron job, compromising the host system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100716?
CVE-2026-100716 is a critical path traversal vulnerability in froxlor, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-59
Which versions are affected by CVE-2026-100716?
How do I fix CVE-2026-100716?
No fix has been published for CVE-2026-100716 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-100716 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100716 exists.
Sources
Also known as GHSA-2wjc-6mgx-hq42, GHSA-x52g-rfx2-v8v7.