Keep Backup Daily <= 2.1.1 - Authenticated (Admin+) Limited Path Traversal via 'kbd_path' Parameter
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| fahadmahmood | Keep Backup Daily | up to 2.1.1 | — | No fix listed | CNA |
- Keep Backup Daily Vendorfahadmahmood Affected up to 2.1.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-3339
- 2026-10-03 Alias added: GHSA-fxxv-5hv8-hp3c
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/01984754-e332-4500-99a2-10a7b79967f5?source=cve
- https://plugins.trac.wordpress.org/browser/keep-backup-daily/tags/2.1.1/inc/functions.php#L855
- https://plugins.trac.wordpress.org/browser/keep-backup-daily/trunk/inc/functions.php#L855
- https://plugins.trac.wordpress.org/browser/keep-backup-daily/tags/2.1.1/inc/functions.php#L871
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3481587%40keep-backup-daily&new=3481587%40keep-backup-daily&sfp_email=&sfph_mail=
More fahadmahmood vulnerabilities
- TI-2025-07361 Injection Guard < 1.2.8 - Reflected XSS via $_SERVER['REQUEST_URI'] CVSS 3.1MEDIUM 6.1
- TI-2025-07132 WP Shopify < 1.5.4 - Reflected XSS CVSS 3.1MEDIUM 6.1
- TI-2024-09127 RSS Feed Widget < 3.0.1 - Reflected XSS CVSS 3.1MEDIUM 4.8
- TI-2025-11633 Easy Upload Files During Checkout <= 2.9.8 - Unauthenticated Arbitrary JavaScript File Upload CVSS 3.1CRITICAL 9.8
- TI-2024-03635 WP Datepicker <= 2.1.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Options Update CVSS 3.1HIGH 8.8
- TI-2026-02908 Injection Guard <= 1.2.9 - Unauthenticated Stored Cross-Site Scripting via Query Parameter Name CVSS 3.1HIGH 7.2
Sources
- CVE-2026-3339 · CVE Program
- CVE-2026-3339 · NVD
- FIRST EPSS
- GHSA-fxxv-5hv8-hp3c · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences