CVE-2026-3339 Details
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.
A limited path traversal vulnerability has been identified in the Keep Backup Daily plugin for WordPress, affecting all versions through 2.1.1. The issue arises in the 'kbd_open_upload_dir' AJAX action, where the 'kbd_path' parameter is inadequately validated. The parameter is only sanitized using 'sanitize_text_field()', which fails to remove path traversal sequences. This vulnerability allows authenticated attackers with Administrator-level access to list the contents of arbitrary directories on the server, outside the designated uploads directory.
Users are advised to update the Keep Backup Daily WordPress plugin to version 2.1.3 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Mar 21, 2026CISA-ADP
Assessed Mar 24, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Keep Backup Daily | <= 2.1.1 (semver) |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 21, 2026 | New CVE Received | [email protected] |