CVE-2026-25334: Salon Booking System Privilege Escalation

CVE-2026-25334 Overview

CVE-2026-25334 is an Incorrect Privilege Assignment vulnerability in the Salon Booking System Pro WordPress plugin developed by wordpresschef. This security flaw allows attackers to perform Privilege Escalation, potentially gaining unauthorized access to higher-privileged accounts within WordPress installations running the vulnerable plugin.

Critical Impact

This vulnerability enables account takeover through privilege escalation, allowing attackers to compromise WordPress administrator accounts and gain full control over affected websites.

Affected Products

• Salon Booking System Pro (salon-booking-plugin-pro) versions prior to 10.30.12
• WordPress installations using vulnerable versions of the plugin

Discovery Timeline

• 2026-03-25 - CVE CVE-2026-25334 published to NVD
• 2026-03-25 - Last updated in NVD database

Technical Details for CVE-2026-25334

Vulnerability Analysis

This vulnerability falls under CWE-266 (Incorrect Privilege Assignment), which occurs when a product incorrectly assigns a privilege to a particular actor, creating an unintended access control gap. In the context of the Salon Booking System Pro plugin, this flaw enables unauthorized privilege escalation that can lead to complete account takeover.

The vulnerability affects the authentication and authorization mechanisms within the plugin, allowing a lower-privileged user or unauthenticated attacker to escalate their privileges to those of another user, potentially including administrator accounts. This type of vulnerability is particularly dangerous in WordPress environments where administrator access provides complete control over the website, including the ability to modify content, install malicious plugins, or compromise user data.

Root Cause

The root cause of this vulnerability is an Incorrect Privilege Assignment (CWE-266) within the Salon Booking System Pro plugin. The plugin fails to properly validate and enforce privilege levels during certain operations, allowing attackers to manipulate the privilege assignment process. This improper access control implementation creates a pathway for unauthorized users to assume the identity and permissions of legitimate higher-privileged accounts.

Attack Vector

The attack vector for this vulnerability involves exploiting the flawed privilege assignment mechanism in the plugin. An attacker can leverage this weakness to perform account takeover attacks by escalating their privileges without proper authorization. The exact exploitation method involves manipulating plugin functionality to bypass normal authentication and authorization checks, ultimately gaining access to accounts with elevated permissions.

For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-25334

Indicators of Compromise

• Unexpected changes to WordPress user roles or permissions
• Unauthorized administrative actions in WordPress audit logs
• New administrator accounts created without authorization
• Suspicious activity originating from the Salon Booking System Pro plugin
• Unusual login patterns or session activity for privileged accounts

Detection Strategies

• Monitor WordPress user role changes and privilege modifications for unauthorized alterations
• Implement web application firewall (WAF) rules to detect and block privilege escalation attempts
• Review plugin-specific logs for anomalous authentication or authorization activity
• Configure alerts for new administrator account creation or role elevation events

Monitoring Recommendations

• Enable comprehensive logging for all WordPress authentication and authorization events
• Deploy SentinelOne Singularity Platform to detect and respond to suspicious activity on WordPress hosting infrastructure
• Implement real-time monitoring of user privilege changes within WordPress
• Regularly audit user accounts and roles to identify unauthorized modifications

How to Mitigate CVE-2026-25334

Immediate Actions Required

• Update Salon Booking System Pro to version 10.30.12 or later immediately
• Review all WordPress user accounts for unauthorized privilege escalations
• Audit recent administrative actions for signs of compromise
• Temporarily disable the Salon Booking System Pro plugin if immediate patching is not possible
• Reset passwords for all administrative accounts as a precaution

Patch Information

The vulnerability has been addressed in Salon Booking System Pro version 10.30.12. Website administrators should update to this version or later to remediate the vulnerability. The patch corrects the improper privilege assignment mechanism that enabled account takeover attacks.

For additional details on the vulnerability and patch information, consult the Patchstack Vulnerability Report.

Workarounds

• Disable the Salon Booking System Pro plugin until the patch can be applied
• Implement additional access controls at the web server level to restrict plugin functionality
• Use WordPress security plugins to enforce strict user role policies
• Restrict administrative access to trusted IP addresses only
• Enable two-factor authentication for all WordPress administrator accounts

# WordPress plugin update via WP-CLI
wp plugin update salon-booking-plugin-pro --version=10.30.12

# Verify current plugin version
wp plugin get salon-booking-plugin-pro --field=version

# List all users with administrator role for audit
wp user list --role=administrator --fields=ID,user_login,user_email