The Salon Booking System WordPress plugin before 10.31.11 does not restrict which user account its salon staff roles may edit through the customers management screen, allowing users with the Salon Staff or Salon Worker role to reset any other user's role, including administrators, to a customer and to overwrite arbitrary profile fields on any account, leading to loss of administrative access and potential site lockout.

The Salon Booking System WordPress plugin before 10.31.11 does not validate a user-supplied image URL before fetching it server-side and writing the response to a publicly accessible location under an attacker-chosen filename, allowing users with the Salon Staff role or higher to force the server to read internal-only resources and disclose them, and to store a malicious SVG that runs arbitrary scripts in the site's origin for anyone who opens it.

The Salon Booking System WordPress plugin before 10.31.11 does not prevent users holding its custom salon staff role from assigning arbitrary capabilities to other accounts when editing a customer, allowing them to escalate any account to administrator and take over the site.

The Salon Booking System WordPress plugin before 10.31.9 does not correctly verify the authenticity of REST API requests and discards WordPress core's nonce check for cookie-authenticated sessions across the whole REST API, allowing unauthenticated attackers who trick a logged-in administrator into clicking a crafted link to forge requests in that administrator's browser, up to creating a new administrator account.

The Salon Booking System WordPress plugin before 10.31.9 does not generate its booking-API access tokens from a secure random source, instead deriving them from a value hardcoded in the Salon Booking System WordPress plugin before 10.31.9 and the second at which a token was issued. An attacker able to constrain when a staff or administrator token was issued can compute a valid token and access the booking API as that user, including an administrator.

Unauthenticated Privilege Escalation in Salon booking system <= 10.31.7 versions.

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Salon Booking System Salon booking system allows File Manipulation.This issue affects Salon booking system: from n/a through 9.9.

The Salon booking system plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the SLNActionAjaxImportAssistants function along with missing authorization checks in all versions up to, and including, 10.2. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

Improper Privilege Management vulnerability in Salon Booking System Salon booking system allows Privilege Escalation.This issue affects Salon booking system: from n/a through 8.6.

Unrestricted Upload of File with Dangerous Type vulnerability in Salon Booking System Salon booking system.This issue affects Salon booking system: from n/a through 9.5.