Vulnerability · Published Jun 4, 2026 · Assigned by GitHub_M
CVE-2026-41236Froxlor has privilege escalation in SSH key synchronization via symlinked `authorized_keys` path
High 8.8
In plain English
A high-severity security flaw in froxlor from froxlor. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Froxlor is open source server administration software. Version 2.3.6 contains a symlink-following flaw in the root-owned SSH key synchronization path used for customer FTP users. The provisioning code appends public keys to `~/.ssh/authorized_keys` under a customer-controlled home directory without verifying that the target path is not a symbolic link. If an attacker controls a shell-enabled customer account and can modify files inside the assigned home directory, the attacker can replace `~/.ssh/authorized_keys` with a symlink to `/root/.ssh/authorized_keys`. When Froxlor's privileged cron task later synchronizes SSH keys, it appends the attacker-supplied key into root's authorized key file, resulting in root SSH access. Version 2.3.7 contains a patch.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | froxlor/froxlor | 2.3.7 | GHSA-mq5v-pxpm-8jw2 |
Affected products (as reported)
Weakness: CWE-59 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/froxlor/froxlor/security/advisories/GHSA-mq5v-pxpm-8jw2 x_refsource_CONFIRM
- https://github.com/froxlor/froxlor/releases/tag/2.3.7 x_refsource_MISC