BookingPress Pro <= 5.6 - Unauthenticated Arbitrary File Upload via Signature Custom Field
Strategic Overview
- Status
- Patched in 5.7
- Affected Plugin
- BookingPress Appointment Booking Pro
- Affected Version
<= 5.6- CVSS
- 9.8Critical
- Weakness type
- CWE-434 · Unrestricted Upload of File with Dangerous Type
- CVE
CVE-2026-6960
At a glance
CVE-2026-6960 is a critical-severity Unrestricted Upload of File with Dangerous Type vulnerability in the BookingPress Appointment Booking Pro WordPress plugin, affecting versions <= 5.6. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 5.7; sites on affected versions should update now. Disclosed May 2026, reported by h0xilo.
Vulnerability Overview
The BookingPress Pro plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'bookingpress_validate_submitted_booking_form_func' function in all versions up to, and including, 5.6. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The vulnerability can only be exploited if a signature custom field is added to the booking form.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-434: Unrestricted Upload of File with Dangerous Type
BookingPress Appointment Booking Pro <= 5.6 carries this weakness at bookingpress_validate_submitted_booking_form_func, and reaching it takes no account at all. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.
If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For BookingPress Appointment Booking Pro the fix is 5.7: builds <= 5.6 are affected, anything from 5.7 onward is not.
Remediation
Update to version 5.7, or a newer patched version
How does WordSec protect against this?
Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: BookingPress Appointment Booking Pro 5.7 closes this, and updating the plugin is the step that ends it.
- Firewall
- Scanner
- Login Security
External References
Related records
Other vulnerabilities in BookingPress Appointment Booking Pro
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