CVE-2026-3339 Keep Backup Daily <= 2.1.1 - Authenticated (Admin+) Limited Path Traversal via 'kbd_path' Parameter
Authenticated administrators can list arbitrary server directories via path traversal in the Keep Backup Daily WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3339?
CVE-2026-3339 is a low-severity path traversal vulnerability in fahadmahmood Keep Backup Daily, published on 20 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Keep Backup Daily plugin for WordPress is vulnerable to Limited Path Traversal in all versions up to, and including, 2.1.1 via the `kbd_open_upload_dir` AJAX action. This is due to insufficient validation of the `kbd_path` parameter, which is only sanitized with `sanitize_text_field()` - a function that does not strip path traversal sequences. This makes it possible for authenticated attackers, with Administrator-level access and above, to list the contents of arbitrary directories on the server outside of the intended uploads directory.
Weakness: CWE-22
Which versions are affected by CVE-2026-3339?
How do I fix CVE-2026-3339?
No fix has been published for CVE-2026-3339 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-2026-3339 being exploited?
There is no known exploitation of CVE-2026-3339 in the wild and no public exploit code.
Sources
Also known as GHSA-fxxv-5hv8-hp3c.